diff --git a/lib/pages/video/detail/replyNew/view.dart b/lib/pages/video/detail/replyNew/view.dart
index 86eb113b..f86683a0 100644
--- a/lib/pages/video/detail/replyNew/view.dart
+++ b/lib/pages/video/detail/replyNew/view.dart
@@ -110,6 +110,7 @@ class _VideoReplyNewDialogState extends State<VideoReplyNewDialog>
 
   @override
   void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
     _replyContentController.dispose();
     super.dispose();
   }