diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/CheckDGEntityUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/CheckDGEntityUtil.java
index 5370f800..67c6e0a2 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/CheckDGEntityUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/CheckDGEntityUtil.java
@@ -69,7 +69,8 @@ public class CheckDGEntityUtil implements ICheckEntityUtil {
       ALog.e(TAG, "文件夹路径不能为null");
       return false;
     }
-    if (!FileUtil.canWrite(dirPath)){
+    File file = new File(dirPath);
+    if (!FileUtil.canWrite(file.getParent()) && !FileUtil.canWrite(dirPath)) {
       ALog.e(TAG, String.format("路径【%s】不可写", dirPath));
       return false;
     }
@@ -77,7 +78,7 @@ public class CheckDGEntityUtil implements ICheckEntityUtil {
       ALog.e(TAG, String.format("文件夹路径【%s】错误", dirPath));
       return false;
     }
-    File file = new File(dirPath);
+
     if (file.isFile()) {
       ALog.e(TAG, String.format("路径【%s】是文件，请设置文件夹路径", dirPath));
       return false;
@@ -131,8 +132,9 @@ public class CheckDGEntityUtil implements ICheckEntityUtil {
    * @return false 任务不再执行，true 任务继续执行
    */
   private boolean checkGroupHash(boolean isIgnoreTaskOccupy, String groupHash) {
-    DownloadGroupEntity dge = DbEntity.findFirst(DownloadGroupEntity.class, "groupHash=?", groupHash);
-    if (dge != null && dge.getGroupHash().equals(mEntity.getGroupHash())){
+    DownloadGroupEntity dge =
+        DbEntity.findFirst(DownloadGroupEntity.class, "groupHash=?", groupHash);
+    if (dge != null && dge.getGroupHash().equals(mEntity.getGroupHash())) {
       mEntity.rowID = dge.rowID;
       return true;
     }
diff --git a/DEV_LOG.md b/DEV_LOG.md
index 57da165c..2a036a39 100644
--- a/DEV_LOG.md
+++ b/DEV_LOG.md
@@ -4,6 +4,7 @@
     - 修复一个重新下载文件时，同名路径文件没有被被删除的问题
     - fix bug https://github.com/AriaLyy/Aria/issues/807
     - fix bug https://github.com/AriaLyy/Aria/issues/811
+    - 修复组合任务在获取子任务信息的过程中，手动停止或删除，没有回调的问题
   + v_3.8.15 (2020/11/9)
     - 修复不支持断点的连接下载失败问题，https://github.com/AriaLyy/Aria/issues/771
     - 修复iv不存在时，索引文件异常的问题，https://github.com/AriaLyy/Aria/issues/780
diff --git a/FtpComponent/src/main/java/com/arialyy/aria/ftp/AbsFtpInfoTask.java b/FtpComponent/src/main/java/com/arialyy/aria/ftp/AbsFtpInfoTask.java
index 3f09ac0d..35af8b43 100644
--- a/FtpComponent/src/main/java/com/arialyy/aria/ftp/AbsFtpInfoTask.java
+++ b/FtpComponent/src/main/java/com/arialyy/aria/ftp/AbsFtpInfoTask.java
@@ -27,6 +27,7 @@ import aria.apache.commons.net.ftp.FTPSClient;
 import com.arialyy.aria.core.AriaConfig;
 import com.arialyy.aria.core.FtpUrlEntity;
 import com.arialyy.aria.core.common.AbsEntity;
+import com.arialyy.aria.core.common.CompleteInfo;
 import com.arialyy.aria.core.common.FtpConnectionMode;
 import com.arialyy.aria.core.loader.IInfoTask;
 import com.arialyy.aria.core.loader.ILoaderVisitor;
@@ -55,7 +56,8 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
   private int mConnectTimeOut;
   protected long mSize = 0;
   protected String charSet = "UTF-8";
-  protected Callback callback;
+  private Callback callback;
+  private boolean isStop = false, isCancel = false;
 
   public AbsFtpInfoTask(TASK_WRAPPER taskWrapper) {
     mTaskWrapper = taskWrapper;
@@ -81,6 +83,14 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
   protected abstract void handelFileInfo(FTPClient client, FTPFile[] files,
       String convertedRemotePath) throws IOException;
 
+  @Override public void stop() {
+    isStop = true;
+  }
+
+  @Override public void cancel() {
+    isCancel = true;
+  }
+
   @Override public void setCallback(Callback callback) {
     this.callback = callback;
   }
@@ -101,10 +111,10 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
       handelFileInfo(client, files, convertedRemotePath);
     } catch (IOException e) {
       e.printStackTrace();
-      failDownload(client, "FTP错误信息", e, true);
+      handleFail(client, "FTP错误信息", e, true);
     } catch (InterruptedException e) {
       e.printStackTrace();
-      failDownload(client, "FTP错误信息", e, true);
+      handleFail(client, "FTP错误信息", e, true);
     } finally {
       closeClient(client);
     }
@@ -146,7 +156,7 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
     }
 
     if (client == null) {
-      failDownload(client, String.format("链接失败, url: %s", mTaskOption.getUrlEntity().url), null,
+      handleFail(client, String.format("链接失败, url: %s", mTaskOption.getUrlEntity().url), null,
           true);
       return null;
     }
@@ -168,14 +178,14 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
     }
 
     if (!loginSuccess) {
-      failDownload(client, "登录失败", null, false);
+      handleFail(client, "登录失败", null, false);
       client.disconnect();
       return null;
     }
 
     int reply = client.getReplyCode();
     if (!FTPReply.isPositiveCompletion(reply)) {
-      failDownload(client, String.format("无法连接到ftp服务器，filePath: %s, url: %s", mEntity.getKey(),
+      handleFail(client, String.format("无法连接到ftp服务器，filePath: %s, url: %s", mEntity.getKey(),
           mTaskOption.getUrlEntity().url), null, true);
       client.disconnect();
       return null;
@@ -299,7 +309,7 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
     for (FTPFile file : files) {
       if (file.isFile()) {
         size += file.getSize();
-        handleFile(path + file.getName(), file);
+        handleFile(client, path + file.getName(), file);
       } else {
         String remotePath = CommonUtil.convertFtpChar(charSet, path + file.getName());
         size += getFileSize(client.listFiles(remotePath), client, path + file.getName());
@@ -314,10 +324,13 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
    * @param remotePath ftp服务器文件夹路径
    * @param ftpFile ftp服务器上对应的文件
    */
-  protected void handleFile(String remotePath, FTPFile ftpFile) {
+  protected void handleFile(FTPClient client, String remotePath, FTPFile ftpFile) {
   }
 
-  protected void failDownload(FTPClient client, String msg, Exception e, boolean needRetry) {
+  protected void handleFail(FTPClient client, String msg, Exception e, boolean needRetry) {
+    if (isStop || isCancel) {
+      return;
+    }
     if (callback != null) {
       if (client == null) {
         msg = "创建ftp客户端失败";
@@ -332,6 +345,10 @@ public abstract class AbsFtpInfoTask<ENTITY extends AbsEntity, TASK_WRAPPER exte
     }
   }
 
+  protected void onSucceed(CompleteInfo info){
+    callback.onSucceed(mEntity.getKey(), info);
+  }
+
   @Override public void accept(ILoaderVisitor visitor) {
     visitor.addComponent(this);
   }
diff --git a/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDFileInfoTask.java b/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDFileInfoTask.java
index 69be1e5f..5fa15bd4 100644
--- a/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDFileInfoTask.java
+++ b/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDFileInfoTask.java
@@ -38,10 +38,10 @@ final class FtpDFileInfoTask extends AbsFtpInfoTask<DownloadEntity, DTaskWrapper
     super(taskEntity);
   }
 
-  @Override protected void handleFile(String remotePath, FTPFile ftpFile) {
-    super.handleFile(remotePath, ftpFile);
+  @Override protected void handleFile(FTPClient client, String remotePath, FTPFile ftpFile) {
+    super.handleFile(client, remotePath, ftpFile);
     if (!FileUtil.checkMemorySpace(mEntity.getFilePath(), ftpFile.getSize())) {
-      callback.onFail(mEntity, new AriaFTPException(
+      handleFail(client, "内存空间不足", new AriaFTPException(
               String.format("获取ftp文件信息失败，内存空间不足, filePath: %s", mEntity.getFilePath())),
           false);
     }
@@ -72,7 +72,7 @@ final class FtpDFileInfoTask extends AbsFtpInfoTask<DownloadEntity, DTaskWrapper
       }
       closeClient(client);
 
-      failDownload(client,
+      handleFail(client,
           String.format("文件不存在，url: %s, remotePath：%s", mTaskOption.getUrlEntity().url,
               getRemotePath()), null, false);
       return;
@@ -90,7 +90,7 @@ final class FtpDFileInfoTask extends AbsFtpInfoTask<DownloadEntity, DTaskWrapper
     int reply = client.getReplyCode();
     if (!FTPReply.isPositiveCompletion(reply)) {
       closeClient(client);
-      failDownload(client, "获取文件信息错误，url: " + mTaskOption.getUrlEntity().url, null, true);
+      handleFail(client, "获取文件信息错误，url: " + mTaskOption.getUrlEntity().url, null, true);
       return;
     }
     mTaskWrapper.setCode(reply);
@@ -112,6 +112,6 @@ final class FtpDFileInfoTask extends AbsFtpInfoTask<DownloadEntity, DTaskWrapper
       mTaskWrapper.setNewTask(true);
     }
     mEntity.setFileSize(mSize);
-    callback.onSucceed(mEntity.getUrl(), new CompleteInfo(code, mTaskWrapper));
+    onSucceed(new CompleteInfo(code, mTaskWrapper));
   }
 }
diff --git a/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDGInfoTask.java b/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDGInfoTask.java
index 192ec78a..9cd669a6 100644
--- a/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDGInfoTask.java
+++ b/FtpComponent/src/main/java/com/arialyy/aria/ftp/download/FtpDGInfoTask.java
@@ -49,7 +49,7 @@ final class FtpDGInfoTask extends AbsFtpInfoTask<DownloadGroupEntity, DGTaskWrap
 
   @Override public void run() {
     if (mTaskWrapper.getEntity().getFileSize() > 1 && checkSubOption()) {
-      callback.onSucceed(mEntity.getKey(), new CompleteInfo(200, mTaskWrapper));
+      onSucceed(new CompleteInfo(200, mTaskWrapper));
     } else {
       super.run();
     }
@@ -80,7 +80,7 @@ final class FtpDGInfoTask extends AbsFtpInfoTask<DownloadGroupEntity, DGTaskWrap
       }
       closeClient(client);
 
-      failDownload(client,
+      handleFail(client,
           String.format("文件不存在，url: %s, remotePath：%s", mTaskOption.getUrlEntity().url,
               getRemotePath()), null, false);
       return;
@@ -98,7 +98,7 @@ final class FtpDGInfoTask extends AbsFtpInfoTask<DownloadGroupEntity, DGTaskWrap
     int reply = client.getReplyCode();
     if (!FTPReply.isPositiveCompletion(reply)) {
       closeClient(client);
-      failDownload(client, "获取文件信息错误，url: " + mTaskOption.getUrlEntity().url, null, true);
+      handleFail(client, "获取文件信息错误，url: " + mTaskOption.getUrlEntity().url, null, true);
       return;
     }
     mTaskWrapper.setCode(reply);
@@ -127,8 +127,8 @@ final class FtpDGInfoTask extends AbsFtpInfoTask<DownloadGroupEntity, DGTaskWrap
     return mTaskOption.getUrlEntity().remotePath;
   }
 
-  @Override protected void handleFile(String remotePath, FTPFile ftpFile) {
-    super.handleFile(remotePath, ftpFile);
+  @Override protected void handleFile(FTPClient client, String remotePath, FTPFile ftpFile) {
+    super.handleFile(client, remotePath, ftpFile);
     addEntity(remotePath, ftpFile);
   }
 
@@ -138,7 +138,7 @@ final class FtpDGInfoTask extends AbsFtpInfoTask<DownloadGroupEntity, DGTaskWrap
     for (DTaskWrapper wrapper : mTaskWrapper.getSubTaskWrapper()) {
       cloneInfo(wrapper);
     }
-    callback.onSucceed(mEntity.getKey(), new CompleteInfo(code, mTaskWrapper));
+    onSucceed(new CompleteInfo(code, mTaskWrapper));
   }
 
   private void cloneInfo(DTaskWrapper subWrapper) {
@@ -234,8 +234,8 @@ final class FtpDGInfoTask extends AbsFtpInfoTask<DownloadGroupEntity, DGTaskWrap
   }
 
   @Override
-  protected void failDownload(FTPClient client, String msg, Exception e, boolean needRetry) {
-    super.failDownload(client, msg, e, needRetry);
+  protected void handleFail(FTPClient client, String msg, Exception e, boolean needRetry) {
+    super.handleFail(client, msg, e, needRetry);
     DeleteDGRecord.getInstance().deleteRecord(mTaskWrapper.getEntity(), true, true);
   }
 }
diff --git a/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpUFileInfoTask.java b/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpUFileInfoTask.java
index 58ecaef4..b4066157 100644
--- a/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpUFileInfoTask.java
+++ b/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpUFileInfoTask.java
@@ -60,7 +60,7 @@ final class FtpUFileInfoTask extends AbsFtpInfoTask<UploadEntity, UTaskWrapper>
       return;
     }
 
-    handleFile(getRemotePath(), files.length == 0 ? null : files[0]);
+    handleFile(client, getRemotePath(), files.length == 0 ? null : files[0]);
     int reply = client.getReplyCode();
     if (!FTPReply.isPositiveCompletion(reply)) {
       //服务器上没有该文件路径，表示该任务为新的上传任务
@@ -133,8 +133,8 @@ final class FtpUFileInfoTask extends AbsFtpInfoTask<UploadEntity, UTaskWrapper>
    * @param remotePath ftp服务器文件夹路径
    * @param ftpFile ftp服务器上对应的文件
    */
-  @Override protected void handleFile(String remotePath, FTPFile ftpFile) {
-    super.handleFile(remotePath, ftpFile);
+  @Override protected void handleFile(FTPClient client,String remotePath, FTPFile ftpFile) {
+    super.handleFile(client, remotePath, ftpFile);
     this.ftpFile = ftpFile;
     if (ftpFile != null && ftpFile.getSize() == mEntity.getFileSize()) {
       isComplete = true;
@@ -145,6 +145,6 @@ final class FtpUFileInfoTask extends AbsFtpInfoTask<UploadEntity, UTaskWrapper>
     super.onPreComplete(code);
     CompleteInfo info = new CompleteInfo(isComplete ? CODE_COMPLETE : code, mTaskWrapper);
     info.obj = ftpFile;
-    callback.onSucceed(mEntity.getKey(), info);
+    onSucceed(info);
   }
 }
diff --git a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java
index 0ef1ea92..91423587 100644
--- a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java
+++ b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java
@@ -64,6 +64,7 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
   private int mConnectTimeOut;
   private Callback callback;
   private HttpTaskOption taskOption;
+  private boolean isStop = false, isCancel = false;
 
   HttpDFileInfoTask(DTaskWrapper taskWrapper) {
     this.mTaskWrapper = taskWrapper;
@@ -81,7 +82,7 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
       conn = ConnectionHelp.handleConnection(url, taskOption);
       ConnectionHelp.setConnectParam(taskOption, conn);
       conn.setRequestProperty("Range", "bytes=" + 0 + "-");
-      if (AriaConfig.getInstance().getDConfig().isUseHeadRequest()){
+      if (AriaConfig.getInstance().getDConfig().isUseHeadRequest()) {
         ALog.d(TAG, "head请求");
         conn.setRequestMethod("HEAD");
       }
@@ -111,6 +112,14 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
     this.callback = callback;
   }
 
+  @Override public void stop() {
+    isStop = true;
+  }
+
+  @Override public void cancel() {
+    isCancel = true;
+  }
+
   private void handleConnect(HttpURLConnection conn) throws IOException {
     if (taskOption.getRequestEnum() == RequestEnum.POST) {
       Map<String, String> params = taskOption.getParams();
@@ -232,7 +241,7 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
         || code == HttpURLConnection.HTTP_CREATED // 201 跳转
         || code == 307) {
       handleUrlReTurn(conn, conn.getHeaderField("Location"));
-    }else if (code == 416){ // 处理0k长度的文件的情况
+    } else if (code == 416) { // 处理0k长度的文件的情况
       ALog.w(TAG, "文件长度为0，不支持断点");
       mTaskWrapper.setSupportBP(false);
       mTaskWrapper.setNewTask(true);
@@ -245,12 +254,13 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
           String.format("任务下载失败，errorCode：%s, errorMsg: %s, url: %s", code,
               conn.getResponseMessage(), mEntity.getUrl())), !CheckUtil.httpIsBadRequest(code));
     }
+    if (isStop || isCancel) {
+      return;
+    }
     if (end) {
       taskOption.setChunked(isChunked);
-      if (callback != null) {
-        CompleteInfo info = new CompleteInfo(code, mTaskWrapper);
-        callback.onSucceed(mEntity.getUrl(), info);
-      }
+      CompleteInfo info = new CompleteInfo(code, mTaskWrapper);
+      callback.onSucceed(mEntity.getUrl(), info);
       mEntity.update();
     }
   }
@@ -343,7 +353,7 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
     ConnectionHelp.setConnectParam(taskOption, conn);
     conn.setRequestProperty("Cookie", cookies);
     conn.setRequestProperty("Range", "bytes=" + 0 + "-");
-    if (AriaConfig.getInstance().getDConfig().isUseHeadRequest()){
+    if (AriaConfig.getInstance().getDConfig().isUseHeadRequest()) {
       conn.setRequestMethod("HEAD");
     }
     conn.setConnectTimeout(mConnectTimeOut);
@@ -367,6 +377,9 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
   }
 
   private void failDownload(AriaHTTPException e, boolean needRetry) {
+    if (isStop || isCancel) {
+      return;
+    }
     if (callback != null) {
       callback.onFail(mEntity, e, needRetry);
     }
diff --git a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDGInfoTask.java b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDGInfoTask.java
index b02e1b44..50ffbe76 100644
--- a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDGInfoTask.java
+++ b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDGInfoTask.java
@@ -45,6 +45,7 @@ public final class HttpDGInfoTask implements IInfoTask {
   private AtomicInteger count = new AtomicInteger();
   private AtomicInteger failCount = new AtomicInteger();
   private DownloadGroupListener listener;
+  private boolean isStop = false, isCancel = false;
 
   /**
    * 子任务回调
@@ -71,6 +72,24 @@ public final class HttpDGInfoTask implements IInfoTask {
     this.listener = listener;
   }
 
+  /**
+   * 停止
+   */
+  @Override
+  public void stop() {
+    isStop = true;
+    if (mPool != null) {
+      mPool.shutdown();
+    }
+  }
+
+  @Override public void cancel() {
+    isCancel = true;
+    if (mPool != null) {
+      mPool.shutdown();
+    }
+  }
+
   @Override public void run() {
     // 如果是isUnknownSize()标志，并且获取大小没有完成，则直接回调onStop
     if (mPool != null && !getLenComplete) {
@@ -131,6 +150,11 @@ public final class HttpDGInfoTask implements IInfoTask {
    * 检查组合任务大小是否获取完成，获取完成后取消阻塞，并设置组合任务大小
    */
   private void checkGetSizeComplete(int count, int failCount) {
+    if (isStop || isCancel){
+      ALog.w(TAG, "任务已停止或已取消，isStop = " + isStop + ", isCancel = " + isCancel);
+      notifyLock();
+      return;
+    }
     if (failCount == wrapper.getSubTaskWrapper().size()) {
       callback.onFail(wrapper.getEntity(), new AriaHTTPException("获取子任务长度失败"), false);
       notifyLock();
diff --git a/M3U8Component/src/main/java/com/arialyy/aria/m3u8/M3U8InfoTask.java b/M3U8Component/src/main/java/com/arialyy/aria/m3u8/M3U8InfoTask.java
index 84a6b7e8..1970009f 100644
--- a/M3U8Component/src/main/java/com/arialyy/aria/m3u8/M3U8InfoTask.java
+++ b/M3U8Component/src/main/java/com/arialyy/aria/m3u8/M3U8InfoTask.java
@@ -115,6 +115,14 @@ final public class M3U8InfoTask implements IInfoTask {
     mCallback = callback;
   }
 
+  @Override public void stop() {
+    this.isStop = true;
+  }
+
+  @Override public void cancel() {
+    this.isStop = true;
+  }
+
   private void handleConnect(String tsListUrl, HttpURLConnection conn) throws IOException {
     int code = conn.getResponseCode();
     if (code == HttpURLConnection.HTTP_OK) {
@@ -205,8 +213,7 @@ final public class M3U8InfoTask implements IInfoTask {
       }
       CompleteInfo info = new CompleteInfo();
       info.obj = extInf;
-
-      mCallback.onSucceed(mEntity.getKey(), info);
+      onSucceed(info);
       if (fos != null) {
         fos.close();
       }
@@ -223,6 +230,13 @@ final public class M3U8InfoTask implements IInfoTask {
     }
   }
 
+  private void onSucceed(CompleteInfo info) {
+    if (isStop) {
+      return;
+    }
+    mCallback.onSucceed(mEntity.getKey(), info);
+  }
+
   /**
    * 添加切片信息到索引文件中
    * 直播下载的索引只记录头部信息，不记录EXTINF中的信息，该信息在onGetPeer的方法中添加。
@@ -362,6 +376,9 @@ final public class M3U8InfoTask implements IInfoTask {
   }
 
   private void failDownload(String errorInfo, boolean needRetry) {
+    if (isStop) {
+      return;
+    }
     mCallback.onFail(mEntity, new AriaM3U8Exception(errorInfo), needRetry);
   }
 
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/group/AbsGroupLoader.java b/PublicComponent/src/main/java/com/arialyy/aria/core/group/AbsGroupLoader.java
index 381cbefb..20c7a514 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/group/AbsGroupLoader.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/group/AbsGroupLoader.java
@@ -217,14 +217,20 @@ public abstract class AbsGroupLoader implements ILoaderVisitor, ILoader {
 
   @Override public void cancel() {
     isCancel = true;
+    mInfoTask.cancel();
     closeTimer();
     mSubQueue.removeAllTask();
     mListener.onCancel();
   }
 
   @Override public void stop() {
+    mInfoTask.stop();
     isStop = true;
-    mSubQueue.stopAllTask();
+    if (mSubQueue.getExecSize() == 0) {
+      mListener.onStop(mGTWrapper.getEntity().getCurrentProgress());
+    } else {
+      mSubQueue.stopAllTask();
+    }
     closeTimer();
   }
 
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/group/SimpleSubQueue.java b/PublicComponent/src/main/java/com/arialyy/aria/core/group/SimpleSubQueue.java
index 3ce35f9b..811df698 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/group/SimpleSubQueue.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/group/SimpleSubQueue.java
@@ -43,7 +43,7 @@ final class SimpleSubQueue implements ISubQueue<AbsSubDLoadUtil> {
   /**
    * 最大执行任务数
    */
-  private int mExecSize;
+  private int mMaxExecSize;
 
   /**
    * 是否停止任务任务
@@ -51,7 +51,7 @@ final class SimpleSubQueue implements ISubQueue<AbsSubDLoadUtil> {
   private boolean isStopAll = false;
 
   private SimpleSubQueue() {
-    mExecSize = Configuration.getInstance().dGroupCfg.getSubMaxTaskNum();
+    mMaxExecSize = Configuration.getInstance().dGroupCfg.getSubMaxTaskNum();
   }
 
   static SimpleSubQueue newInstance() {
@@ -73,6 +73,10 @@ final class SimpleSubQueue implements ISubQueue<AbsSubDLoadUtil> {
     return mCache.size();
   }
 
+  public int getExecSize(){
+    return mExec.size();
+  }
+
   boolean isStopAll() {
     return isStopAll;
   }
@@ -82,7 +86,7 @@ final class SimpleSubQueue implements ISubQueue<AbsSubDLoadUtil> {
   }
 
   @Override public void startTask(AbsSubDLoadUtil fileer) {
-    if (mExec.size() < mExecSize) {
+    if (mExec.size() < mMaxExecSize) {
       mCache.remove(fileer.getKey());
       mExec.put(fileer.getKey(), fileer);
       ALog.d(TAG,
@@ -102,6 +106,7 @@ final class SimpleSubQueue implements ISubQueue<AbsSubDLoadUtil> {
   @Override public void stopAllTask() {
     isStopAll = true;
     ALog.d(TAG, "停止组合任务");
+    mCache.clear();
     Set<String> keys = mExec.keySet();
     for (String key : keys) {
       AbsSubDLoadUtil loader = mExec.get(key);
@@ -117,12 +122,12 @@ final class SimpleSubQueue implements ISubQueue<AbsSubDLoadUtil> {
       ALog.e(TAG, String.format("修改组合任务子任务队列数失败，num: %s", num));
       return;
     }
-    if (num == mExecSize) {
-      ALog.i(TAG, String.format("忽略此次修改，oldSize: %s, num: %s", mExecSize, num));
+    if (num == mMaxExecSize) {
+      ALog.i(TAG, String.format("忽略此次修改，oldSize: %s, num: %s", mMaxExecSize, num));
       return;
     }
-    int oldSize = mExecSize;
-    mExecSize = num;
+    int oldSize = mMaxExecSize;
+    mMaxExecSize = num;
     int diff = Math.abs(oldSize - num);
 
     if (oldSize < num) { // 处理队列变小的情况，该情况下将停止队尾任务，并将这些任务添加到缓存队列中
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/AbsNormalLoader.java b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/AbsNormalLoader.java
index 6b6685f1..4282ef58 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/AbsNormalLoader.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/AbsNormalLoader.java
@@ -229,6 +229,7 @@ public abstract class AbsNormalLoader<T extends AbsTaskWrapper> implements ILoad
       ALog.d(TAG, String.format("任务【%s】正在删除，删除任务失败", mTaskWrapper.getKey()));
       return;
     }
+    mInfoTask.cancel();
     closeTimer();
     isCancel = true;
     onCancel();
@@ -262,6 +263,7 @@ public abstract class AbsNormalLoader<T extends AbsTaskWrapper> implements ILoad
     if (isStop) {
       return;
     }
+    mInfoTask.stop();
     closeTimer();
     isStop = true;
     onStop();
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/IInfoTask.java b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/IInfoTask.java
index ee7da5ef..70a532e4 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/IInfoTask.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/IInfoTask.java
@@ -34,6 +34,16 @@ public interface IInfoTask extends ILoaderComponent {
    */
   void setCallback(Callback callback);
 
+  /**
+   * 任务停止
+   */
+  void stop();
+
+  /**
+   * 任务取消
+   */
+  void cancel();
+
   interface Callback {
     /**
      * 处理完成
diff --git a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/AbsSFtpInfoTask.java b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/AbsSFtpInfoTask.java
index 5e7bba77..e4f6d1c6 100644
--- a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/AbsSFtpInfoTask.java
+++ b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/AbsSFtpInfoTask.java
@@ -16,6 +16,7 @@
 package com.arialyy.aria.sftp;
 
 import com.arialyy.aria.core.FtpUrlEntity;
+import com.arialyy.aria.core.common.CompleteInfo;
 import com.arialyy.aria.core.loader.IInfoTask;
 import com.arialyy.aria.core.loader.ILoaderVisitor;
 import com.arialyy.aria.core.wrapper.AbsTaskWrapper;
@@ -32,9 +33,10 @@ import java.io.UnsupportedEncodingException;
  */
 public abstract class AbsSFtpInfoTask<WP extends AbsTaskWrapper> implements IInfoTask {
   protected String TAG = CommonUtil.getClassName(this);
-  protected Callback callback;
+  private Callback callback;
   private WP wrapper;
   private SFtpTaskOption option;
+  private boolean isStop = false, isCancel = false;
 
   public AbsSFtpInfoTask(WP wp) {
     this.wrapper = wp;
@@ -44,6 +46,28 @@ public abstract class AbsSFtpInfoTask<WP extends AbsTaskWrapper> implements IInf
   protected abstract void getFileInfo(Session session)
       throws JSchException, UnsupportedEncodingException, SftpException;
 
+  @Override public void stop() {
+    isStop = true;
+  }
+
+  @Override public void cancel() {
+    isCancel = true;
+  }
+
+  protected void handleFail(AriaException e, boolean needRetry) {
+    if (isStop || isCancel){
+      return;
+    }
+    callback.onFail(getWrapper().getEntity(), e, needRetry);
+  }
+
+  protected void onSucceed(CompleteInfo info){
+    if (isStop || isCancel){
+      return;
+    }
+    callback.onSucceed(getWrapper().getKey(), info);
+  }
+
   @Override public void run() {
     try {
       FtpUrlEntity entity = option.getUrlEntity();
diff --git a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDInfoTask.java b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDInfoTask.java
index bfbe342f..97429f4f 100644
--- a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDInfoTask.java
+++ b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDInfoTask.java
@@ -39,7 +39,7 @@ final class SFtpDInfoTask extends AbsSFtpInfoTask<DTaskWrapper> {
   }
 
   @Override protected void getFileInfo(Session session) throws JSchException,
-      UnsupportedEncodingException, SftpException {
+      UnsupportedEncodingException {
     SFtpTaskOption option = (SFtpTaskOption) getWrapper().getTaskOption();
     ChannelSftp channel = (ChannelSftp) session.openChannel("sftp");
     channel.connect(1000);
@@ -60,10 +60,9 @@ final class SFtpDInfoTask extends AbsSFtpInfoTask<DTaskWrapper> {
       getWrapper().getEntity().setFileSize(attr.getSize());
       CompleteInfo info = new CompleteInfo();
       info.code = 200;
-      callback.onSucceed(getWrapper().getKey(), info);
+      onSucceed(info);
     } else {
-      callback.onFail(getWrapper().getEntity(),
-          new AriaSFTPException(String.format("文件不存在，remotePath：%s", remotePath)), false);
+      handleFail(new AriaSFTPException(String.format("文件不存在，remotePath：%s", remotePath)), false);
     }
     channel.disconnect();
   }
diff --git a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpUInfoTask.java b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpUInfoTask.java
index 138c38a2..cdac02d0 100644
--- a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpUInfoTask.java
+++ b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpUInfoTask.java
@@ -64,6 +64,6 @@ final class SFtpUInfoTask extends AbsSFtpInfoTask<UTaskWrapper> {
     info.code = isComplete ? ISCOMPLETE : 200;
     info.obj = attr;
     channel.disconnect();
-    callback.onSucceed(getWrapper().getKey(), info);
+    onSucceed(info);
   }
 }