diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupEntity.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupEntity.java
index 5b82ddfc..42c9040c 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupEntity.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupEntity.java
@@ -18,6 +18,7 @@ package com.arialyy.aria.core.download;
 import android.os.Parcel;
 import com.arialyy.aria.core.inf.AbsGroupEntity;
 import com.arialyy.aria.orm.OneToMany;
+import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -27,15 +28,29 @@ import java.util.List;
  */
 public class DownloadGroupEntity extends AbsGroupEntity {
 
-  @OneToMany(table = DownloadEntity.class, key = "groupName")
-  private List<DownloadEntity> mChild = new LinkedList<>();
+  @OneToMany(table = DownloadEntity.class, key = "groupName") private List<DownloadEntity>
+      mSubtask = new ArrayList<>();
 
-  public List<DownloadEntity> getChild() {
-    return mChild;
+  //任务组下载文件的文件夹地址
+  private String mDirPath = "";
+
+  public List<DownloadEntity> getSubTask() {
+    return mSubtask;
+  }
+
+  public void setSubTasks(List<DownloadEntity> subTasks) {
+    this.mSubtask = subTasks;
   }
 
-  public void setChild(List<DownloadEntity> child) {
-    this.mChild = child;
+  public String getDirPath() {
+    return mDirPath;
+  }
+
+  public void setDirPath(String dirPath) {
+    this.mDirPath = dirPath;
+  }
+
+  public DownloadGroupEntity() {
   }
 
   @Override public int describeContents() {
@@ -44,15 +59,14 @@ public class DownloadGroupEntity extends AbsGroupEntity {
 
   @Override public void writeToParcel(Parcel dest, int flags) {
     super.writeToParcel(dest, flags);
-    dest.writeTypedList(this.mChild);
-  }
-
-  public DownloadGroupEntity() {
+    dest.writeTypedList(this.mSubtask);
+    dest.writeString(this.mDirPath);
   }
 
   protected DownloadGroupEntity(Parcel in) {
     super(in);
-    this.mChild = in.createTypedArrayList(DownloadEntity.CREATOR);
+    this.mSubtask = in.createTypedArrayList(DownloadEntity.CREATOR);
+    this.mDirPath = in.readString();
   }
 
   public static final Creator<DownloadGroupEntity> CREATOR = new Creator<DownloadGroupEntity>() {
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
index f8577e60..11a03da7 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
@@ -15,27 +15,38 @@
  */
 package com.arialyy.aria.core.download;
 
+import android.text.TextUtils;
 import com.arialyy.aria.core.inf.AbsGroupTarget;
 import com.arialyy.aria.core.inf.IEntity;
 import com.arialyy.aria.orm.DbEntity;
-import com.arialyy.aria.util.CheckUtil;
 import com.arialyy.aria.util.CommonUtil;
 import java.io.File;
+import java.util.ArrayList;
+import java.util.LinkedList;
 import java.util.List;
+import java.util.Map;
 
 /**
  * Created by AriaL on 2017/6/29.
  */
 public class DownloadGroupTarget
     extends AbsGroupTarget<DownloadGroupTarget, DownloadGroupEntity, DownloadGroupTaskEntity> {
-  private List<String> mUrls;
+  private List<String> mUrls = new ArrayList<>();
+  /**
+   * 子任务文件名
+   */
+  private List<String> mSubtaskFileName = new ArrayList<>();
   private String mGroupName;
+  /**
+   * 是否已经设置了文件路径
+   */
+  private boolean isSetDirPathed = false;
 
   DownloadGroupTarget(List<String> urls, String targetName) {
     this.mTargetName = targetName;
     this.mUrls = urls;
     mGroupName = CommonUtil.getMd5Code(urls);
-    mTaskEntity = DbEntity.findData(DownloadGroupTaskEntity.class, "key=?", mGroupName);
+    mTaskEntity = DbEntity.findFirst(DownloadGroupTaskEntity.class, "key=?", mGroupName);
     if (mTaskEntity == null) {
       mTaskEntity = new DownloadGroupTaskEntity();
       mTaskEntity.key = mGroupName;
@@ -49,7 +60,7 @@ public class DownloadGroupTarget
 
   private DownloadGroupEntity getDownloadGroupEntity() {
     DownloadGroupEntity entity =
-        DbEntity.findData(DownloadGroupEntity.class, "groupName=?", mGroupName);
+        DbEntity.findFirst(DownloadGroupEntity.class, "groupName=?", mGroupName);
     if (entity == null) {
       entity = new DownloadGroupEntity();
     }
@@ -58,7 +69,7 @@ public class DownloadGroupTarget
 
   /**
    * 设置任务组的文件夹路径，在Aria中，任务组的所有子任务都会下载到以任务组组名的文件夹中。
-   * 如：groupDirPath = "/mnt/sdcard/download/", groupName = "group_test"
+   * 如：groupDirPath = "/mnt/sdcard/download/group_test"
    * <pre>
    *   {@code
    *      + mnt
@@ -75,43 +86,86 @@ public class DownloadGroupTarget
    *
    * @param groupDirPath 任务组保存文件夹路径
    */
-  public DownloadGroupTarget setDownloadPath(String groupDirPath) {
+  public DownloadGroupTarget setDownloadDirPath(String groupDirPath) {
+    if (TextUtils.isEmpty(groupDirPath)) {
+      throw new NullPointerException("任务组文件夹保存路径不能为null");
+    }
+
+    if (mEntity.getDirPath().equals(groupDirPath)) return this;
 
+    File file = new File(groupDirPath);
+    if (file.exists() && file.isFile()) {
+      throw new IllegalArgumentException("路径不能为文件");
+    }
+    if (!file.exists()) {
+      file.mkdirs();
+    }
+
+    if (!TextUtils.isEmpty(mEntity.getDirPath())) {
+      reChangeDirPath(groupDirPath);
+    } else {
+      mEntity.setSubTasks(createSubTask());
+    }
+    mEntity.setDirPath(groupDirPath);
+    mEntity.update();
+    isSetDirPathed = true;
     return this;
   }
 
   /**
-   * 设置保存路径组
+   * 改变任务组文件夹路径
+   *
+   * @param newDirPath 新的文件夹路径
+   */
+  private void reChangeDirPath(String newDirPath) {
+    List<DownloadEntity> subTask = mEntity.getSubTask();
+    if (subTask != null && !subTask.isEmpty()) {
+      for (DownloadEntity entity : subTask) {
+        File file = new File(entity.getDownloadPath());
+        file.renameTo(new File(newDirPath, entity.getFileName()));
+      }
+    } else {
+      mEntity.setSubTasks(createSubTask());
+    }
+  }
+
+  /**
+   * 设置子任务文件名，该方法如果在{@link #setDownloadDirPath(String)}之前调用，则不生效
    */
-  public DownloadGroupTarget setDownloadPaths(List<String> paths) {
-    CheckUtil.checkDownloadPaths(paths);
-    if (mUrls.size() != paths.size()) {
+  public DownloadGroupTarget setSubtaskFileName(List<String> subTaskFileName) {
+    if (subTaskFileName == null || subTaskFileName.isEmpty()) return this;
+    mSubtaskFileName.addAll(subTaskFileName);
+    if (mUrls.size() != subTaskFileName.size()) {
       throw new IllegalArgumentException("下载链接数必须要和保存路径的数量一致");
     }
-    for (int i = 0, len = mUrls.size(); i < len; i++) {
-      mTaskEntity.getEntity().getChild().add(createDownloadEntity(mUrls.get(i), paths.get(i)));
+    if (isSetDirPathed) {
+      List<DownloadEntity> entities = mEntity.getSubTask();
+      int i = 0;
+      for (DownloadEntity entity : entities) {
+        entity.setFileName(mSubtaskFileName.get(i));
+        entity.update();
+      }
     }
     return this;
   }
 
   /**
-   * 创建子任务下载实体
-   *
-   * @param url 下载地址
-   * @param path 保存路径
+   * 创建子任务
    */
-  private DownloadEntity createDownloadEntity(String url, String path) {
-    DownloadEntity entity = DownloadEntity.findData(DownloadEntity.class, "downloadUrl=?", url);
-    if (entity == null) {
-      entity = new DownloadEntity();
-    }
-    File file = new File(path);
-    if (!file.exists()) {
-      entity.setState(IEntity.STATE_WAIT);
+  private List<DownloadEntity> createSubTask() {
+    List<DownloadEntity> list = new ArrayList<>();
+    for (int i = 0, len = mUrls.size(); i < len; i++) {
+      DownloadEntity entity = new DownloadEntity();
+      entity.setDownloadUrl(mUrls.get(i));
+      String fileName = mSubtaskFileName.get(i);
+      if (TextUtils.isEmpty(fileName)) {
+        fileName = CommonUtil.keyToHashKey(mUrls.get(i));
+      }
+      entity.setDownloadPath(mEntity.getDirPath() + "/" + fileName);
+      entity.setGroupName(mGroupName);
+      entity.save();
+      list.add(entity);
     }
-    entity.setDownloadPath(path);
-    entity.setDownloadUrl(url);
-    entity.setFileName(file.getName());
-    return entity;
+    return list;
   }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
index 260988bf..182d752d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadReceiver.java
@@ -18,15 +18,12 @@ package com.arialyy.aria.core.download;
 import android.support.annotation.NonNull;
 import com.arialyy.aria.core.AriaManager;
 import com.arialyy.aria.core.inf.AbsReceiver;
-import com.arialyy.aria.core.inf.IEntity;
 import com.arialyy.aria.core.inf.IReceiver;
 import com.arialyy.aria.core.command.normal.NormalCmdFactory;
 import com.arialyy.aria.core.scheduler.DownloadSchedulers;
 import com.arialyy.aria.core.scheduler.ISchedulerListener;
-import com.arialyy.aria.orm.DbEntity;
 import com.arialyy.aria.util.CheckUtil;
 import com.arialyy.aria.util.CommonUtil;
-import java.io.File;
 import java.util.List;
 import java.util.Set;
 
@@ -119,14 +116,14 @@ public class DownloadReceiver extends AbsReceiver<DownloadEntity> {
    */
   public DownloadEntity getDownloadEntity(String downloadUrl) {
     CheckUtil.checkDownloadUrl(downloadUrl);
-    return DownloadEntity.findData(DownloadEntity.class, "downloadUrl=?", downloadUrl);
+    return DownloadEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl);
   }
 
   /**
    * 下载任务是否存在
    */
   @Override public boolean taskExists(String downloadUrl) {
-    return DownloadEntity.findData(DownloadEntity.class, "downloadUrl=?", downloadUrl) != null;
+    return DownloadEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl) != null;
   }
 
   @Override public List<DownloadEntity> getTaskList() {
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
index 1fa76a8f..799e729d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
@@ -36,7 +36,7 @@ public class DownloadTarget
 
   DownloadTarget(String url, String targetName) {
     mTargetName = targetName;
-    mTaskEntity = DbEntity.findData(DownloadTaskEntity.class, "key=?", url);
+    mTaskEntity = DbEntity.findFirst(DownloadTaskEntity.class, "key=?", url);
     if (mTaskEntity == null) {
       mTaskEntity = new DownloadTaskEntity();
       mTaskEntity.entity = new DownloadEntity();
@@ -54,7 +54,7 @@ public class DownloadTarget
    */
   private DownloadEntity getEntity(String downloadUrl) {
     DownloadEntity entity =
-        DownloadEntity.findData(DownloadEntity.class, "downloadUrl=?", downloadUrl);
+        DownloadEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl);
     if (entity == null) {
       entity = new DownloadEntity();
     }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java
index 2232722c..90ed0cbe 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/DownloadGroupUtil.java
@@ -81,7 +81,7 @@ public class DownloadGroupUtil implements IDownloadUtil {
     mInfoPool = Executors.newCachedThreadPool();
     mExePool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
 
-    for (DownloadEntity entity : mTaskEntity.entity.getChild()) {
+    for (DownloadEntity entity : mTaskEntity.entity.getSubTask()) {
       File file = new File(entity.getDownloadPath());
       if (entity.isDownloadComplete() && file.exists()) {
         mTotalSize += entity.getFileSize();
@@ -175,7 +175,7 @@ public class DownloadGroupUtil implements IDownloadUtil {
             startChildDownload(te);
           }
           mInitNum++;
-          if (mInitNum + mFailNum == mTaskEntity.getEntity().getChild().size()) {
+          if (mInitNum + mFailNum == mTaskEntity.getEntity().getSubTask().size()) {
             startRunningFlow();
           }
         }
@@ -191,7 +191,7 @@ public class DownloadGroupUtil implements IDownloadUtil {
           if (failNum < 10) {
             mInfoPool.execute(createFileInfoThread(te));
           }
-          if (mInitNum + mFailNum == mTaskEntity.getEntity().getChild().size()) {
+          if (mInitNum + mFailNum == mTaskEntity.getEntity().getSubTask().size()) {
             startRunningFlow();
           }
         }
@@ -238,7 +238,7 @@ public class DownloadGroupUtil implements IDownloadUtil {
    */
   private DownloadTaskEntity createDownloadTask(DownloadEntity entity) {
     DownloadTaskEntity taskEntity =
-        DbEntity.findData(DownloadTaskEntity.class, "key=?", entity.getDownloadUrl());
+        DbEntity.findFirst(DownloadTaskEntity.class, "key=?", entity.getDownloadUrl());
     if (taskEntity != null) {
       return taskEntity;
     }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/Downloader.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/Downloader.java
index 7d1eae99..8ff32489 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/Downloader.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/Downloader.java
@@ -192,7 +192,7 @@ class Downloader implements Runnable, IDownloadUtil {
       CommonUtil.createFile(mConfigFile.getPath());
     } else if (!mTempFile.exists()) {
       isNewTask = true;
-    } else if (DbEntity.findData(DownloadEntity.class, "downloadUrl=?", mEntity.getDownloadUrl())
+    } else if (DbEntity.findFirst(DownloadEntity.class, "downloadUrl=?", mEntity.getDownloadUrl())
         == null) {
       isNewTask = true;
     } else {
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java
index 3d47e2ca..eb410f07 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadReceiver.java
@@ -17,21 +17,17 @@ package com.arialyy.aria.core.upload;
 
 import android.support.annotation.NonNull;
 import com.arialyy.aria.core.AriaManager;
-import com.arialyy.aria.core.command.normal.AbsNormalCmd;
 import com.arialyy.aria.core.command.normal.NormalCmdFactory;
 import com.arialyy.aria.core.download.DownloadTaskEntity;
 import com.arialyy.aria.core.inf.AbsReceiver;
-import com.arialyy.aria.core.inf.IEntity;
 import com.arialyy.aria.core.inf.IReceiver;
 import com.arialyy.aria.core.scheduler.ISchedulerListener;
 import com.arialyy.aria.core.scheduler.UploadSchedulers;
 import com.arialyy.aria.orm.DbEntity;
 import com.arialyy.aria.util.CheckUtil;
 import com.arialyy.aria.util.CommonUtil;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
-import java.util.regex.Pattern;
 
 /**
  * Created by lyy on 2017/2/6.
@@ -56,14 +52,14 @@ public class UploadReceiver extends AbsReceiver<UploadEntity> {
    */
   public UploadEntity getUploadEntity(String filePath) {
     CheckUtil.checkUploadPath(filePath);
-    return DbEntity.findData(UploadEntity.class, "filePath=?", filePath);
+    return DbEntity.findFirst(UploadEntity.class, "filePath=?", filePath);
   }
 
   /**
    * 下载任务是否存在
    */
   @Override public boolean taskExists(String filePath) {
-    return DbEntity.findData(UploadEntity.class, "filePath=?", filePath) != null;
+    return DbEntity.findFirst(UploadEntity.class, "filePath=?", filePath) != null;
   }
 
   @Override public List<UploadEntity> getTaskList() {
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java
index 94d5ca07..007ac0e3 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/UploadTarget.java
@@ -28,7 +28,7 @@ public class UploadTarget extends AbsNormalTarget<UploadTarget, UploadEntity, Up
 
   UploadTarget(String filePath, String targetName) {
     this.mTargetName = targetName;
-    mTaskEntity = DbEntity.findData(UploadTaskEntity.class, "key=?", filePath);
+    mTaskEntity = DbEntity.findFirst(UploadTaskEntity.class, "key=?", filePath);
     if (mTaskEntity == null) {
       mTaskEntity = new UploadTaskEntity();
       mTaskEntity.entity = new UploadEntity();
@@ -40,7 +40,7 @@ public class UploadTarget extends AbsNormalTarget<UploadTarget, UploadEntity, Up
   }
 
   private UploadEntity getUploadEntity(String filePath) {
-    UploadEntity entity = UploadEntity.findData(UploadEntity.class, "filePath=?", filePath);
+    UploadEntity entity = UploadEntity.findFirst(UploadEntity.class, "filePath=?", filePath);
     if (entity == null) {
       entity = new UploadEntity();
     }
diff --git a/Aria/src/main/java/com/arialyy/aria/orm/DbEntity.java b/Aria/src/main/java/com/arialyy/aria/orm/DbEntity.java
index 7747c684..a909b218 100644
--- a/Aria/src/main/java/com/arialyy/aria/orm/DbEntity.java
+++ b/Aria/src/main/java/com/arialyy/aria/orm/DbEntity.java
@@ -57,7 +57,7 @@ public class DbEntity {
   /**
    * 查询一组数据
    * <code>
-   * DownloadEntity.findData(DownloadEntity.class, "downloadUrl=?", downloadUrl);
+   * DownloadEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl);
    * </code>
    *
    * @return 没有数据返回null
@@ -70,12 +70,12 @@ public class DbEntity {
   /**
    * 查询一行数据
    * <code>
-   * DownloadEntity.findData(DownloadEntity.class, "downloadUrl=?", downloadUrl);
+   * DownloadEntity.findFirst(DownloadEntity.class, "downloadUrl=?", downloadUrl);
    * </code>
    *
    * @return 没有数据返回null
    */
-  public static <T extends DbEntity> T findData(Class<T> clazz, String... expression) {
+  public static <T extends DbEntity> T findFirst(Class<T> clazz, String... expression) {
     DbUtil util = DbUtil.getInstance();
     List<T> datas = util.findData(clazz, expression);
     return datas == null ? null : datas.size() > 0 ? datas.get(0) : null;
@@ -149,7 +149,7 @@ public class DbEntity {
     updateRowID();
   }
 
-  private <T extends DbEntity> T findData(Class<T> clazz, @NonNull String[] wheres,
+  private <T extends DbEntity> T findFirst(Class<T> clazz, @NonNull String[] wheres,
       @NonNull String[] values) {
     DbUtil util = DbUtil.getInstance();
     List<T> list = util.findData(clazz, wheres, values);
@@ -178,7 +178,7 @@ public class DbEntity {
           values.add(field.get(this) + "");
         }
       }
-      DbEntity entity = findData(getClass(), where.toArray(new String[where.size()]),
+      DbEntity entity = findFirst(getClass(), where.toArray(new String[where.size()]),
           values.toArray(new String[values.size()]));
       if (entity != null) {
         rowID = entity.rowID;