diff --git a/app/src/main/java/io/legado/app/constant/PreferKey.kt b/app/src/main/java/io/legado/app/constant/PreferKey.kt
index 24ac981e9..446efc0bf 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -10,4 +10,7 @@ object PreferKey {
     const val nextKey = "nextKeyCode"
     const val showRss = "showRss"
     const val bookshelfLayout = "bookshelfLayout"
+    const val recordLog = "recordLog"
+    const val processText = "process_text"
+    const val cleanCache = "cleanCache"
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt
index cee764420..a4a7bd62d 100644
--- a/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt
@@ -12,6 +12,7 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.BookHelp
+import io.legado.app.help.FileHelp
 import io.legado.app.lib.theme.ATH
 import io.legado.app.receiver.SharedReceiverActivity
 import io.legado.app.ui.filechooser.FileChooserDialog
@@ -59,6 +60,11 @@ class ConfigFragment : PreferenceFragmentCompat(),
                 mode = FileChooserDialog.DIRECTORY,
                 initPath = getPreferenceString(PreferKey.downloadPath)
             )
+            PreferKey.cleanCache -> {
+                LogUtils.d("xxx","cleancaches")
+                FileHelp.deleteFile(getPreferenceString(PreferKey.downloadPath))
+                toast("成功清理缓存")
+            }
         }
         return super.onPreferenceTreeClick(preference)
     }
@@ -69,8 +75,8 @@ class ConfigFragment : PreferenceFragmentCompat(),
                 BookHelp.upDownloadPath()
                 findPreference<Preference>(key)?.summary = getPreferenceString(key)
             }
-            "recordLog" -> LogUtils.upLevel()
-            "process_text" -> sharedPreferences?.let {
+            PreferKey.recordLog -> LogUtils.upLevel()
+            PreferKey.processText -> sharedPreferences?.let {
                 setProcessTextEnable(it.getBoolean("process_text", true))
             }
             PreferKey.showRss -> postEvent(PreferKey.showRss, PreferKey.showRss)
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9e6327377..f4786808e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -313,6 +313,7 @@
     <string name="use_to">替换范围，选填书名或者源名</string>
     <string name="menu_action_group">分组</string>
     <string name="download_path">内容缓存路径</string>
+    <string name="cleancache">清理缓存</string>
     <string name="sys_file_picker">系统文件选择器</string>
     <string name="new_version">新版本</string>
     <string name="download_update">下载更新</string>
diff --git a/app/src/main/res/xml/pref_config.xml b/app/src/main/res/xml/pref_config.xml
index 3e9a873b6..bc421509b 100644
--- a/app/src/main/res/xml/pref_config.xml
+++ b/app/src/main/res/xml/pref_config.xml
@@ -39,4 +39,8 @@
         android:key="recordLog"
         android:title="记录日志"
         app:iconSpaceReserved="false" />
+    <Preference
+        android:key="cleanCache"
+        android:title="@string/cleancache"
+        app:iconSpaceReserved="false" />
 </androidx.preference.PreferenceScreen>
\ No newline at end of file