diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookContract.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookContract.kt
index 445e3a5a0..a9b19830e 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookContract.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookContract.kt
@@ -573,6 +573,7 @@ sealed interface ReadBookEffect {
     data object UnregisterTimeBatteryReceiver : ReadBookEffect
     data object RegisterNetworkListener : ReadBookEffect
     data object UnregisterNetworkListener : ReadBookEffect
+    data object SetOrientation : ReadBookEffect
     data object OpenBooksDirPicker : ReadBookEffect
     data object BackupNow : ReadBookEffect
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookController.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookController.kt
index 02ec69b8d..8e86d6218 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookController.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookController.kt
@@ -176,6 +176,7 @@ class ReadBookController(
      * View/Window-only resume — business logic handled by ViewModel via OnResume intent.
      */
     fun onResume() {
+        setOrientation()
         upSystemUiVisibility()
         refs?.readView?.upTime()
         screenOffTimerStart()
@@ -742,6 +743,10 @@ class ReadBookController(
                 networkChangedListener.unRegister()
             }
 
+            is ReadBookEffect.SetOrientation -> {
+                setOrientation()
+            }
+
             is ReadBookEffect.BackupNow -> {
                 Backup.autoBack(activity)
             }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
index b4d650e6e..f624f3a3c 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
@@ -1285,6 +1285,9 @@ class ReadBookViewModel(
                 if (old != null && old.keepLight != preferences.keepLight) {
                     _effects.tryEmit(ReadBookEffect.UpScreenTimeOut)
                 }
+                if (old != null && old.screenOrientation != preferences.screenOrientation) {
+                    _effects.tryEmit(ReadBookEffect.SetOrientation)
+                }
             }
         }
     }