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 80efd5925..1cb5e2edc 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -21,4 +21,5 @@ object PreferKey {
     const val backupPath = "backupUri"
     const val threadCount = "threadCount"
     const val keepLight = "keep_light"
+    const val autoDarkMode = "autoDarkMode"
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/PrefExtensions.kt b/app/src/main/java/io/legado/app/help/PrefExtensions.kt
index 4b89939cc..4b8daf1e4 100644
--- a/app/src/main/java/io/legado/app/help/PrefExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/PrefExtensions.kt
@@ -15,4 +15,7 @@ val Context.isShowRSS: Boolean
     get() = getPrefBoolean(PreferKey.showRss, true)
 
 val Context.threadCount: Int
-    get() = getPrefInt(PreferKey.threadCount, 16)
\ No newline at end of file
+    get() = getPrefInt(PreferKey.threadCount, 16)
+
+val Context.autoDarkMode: Boolean
+    get() = getPrefBoolean(PreferKey.autoDarkMode, true)
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 12ceceb6d..1e352f8e4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -582,5 +582,7 @@
     <string name="text_too_long_qr_error">文字太多,生成二维码失败</string>
     <string name="share_rss_source">分享RSS源</string>
     <string name="share_book_source">分享书源</string>
+    <string name="auto_dark_mode">自动切换夜间模式</string>
+    <string name="auto_dark_mode_s">夜间模式跟随系统</string>
 
 </resources>
diff --git a/app/src/main/res/xml/pref_config_theme.xml b/app/src/main/res/xml/pref_config_theme.xml
index f9f3df963..853b2fb12 100644
--- a/app/src/main/res/xml/pref_config_theme.xml
+++ b/app/src/main/res/xml/pref_config_theme.xml
@@ -2,6 +2,12 @@
 <androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <io.legado.app.lib.theme.prefs.ATESwitchPreference
+        android:defaultValue="true"
+        android:key="autoDarkMode"
+        android:summary="@string/auto_dark_mode_s"
+        android:title="@string/auto_dark_mode"
+        app:iconSpaceReserved="false" />
 
     <io.legado.app.lib.theme.prefs.ATESwitchPreference
         android:defaultValue="true"