diff --git a/lib/i18n/app_en.arb b/lib/i18n/app_en.arb
index 7827a82..85d3e3a 100644
--- a/lib/i18n/app_en.arb
+++ b/lib/i18n/app_en.arb
@@ -13,6 +13,7 @@
   "edit": "Edit",
   "delete": "Delete",
   "action": "Action",
+  "cancel": "Cancel",
   "report": "Report",
   "reaction": "Reaction",
   "reactVerb": "React",
@@ -27,6 +28,7 @@
   "postIdentityNotify": "You will create this post as",
   "postContentPlaceholder": "What's happened?!",
   "postDeleteConfirm": "Are you sure you want to delete this post? This operation cannot be revert!",
+  "postEditNotify": "You are about editing a post that already published.",
   "reactionAdded": "Your reaction has been added.",
   "reactionRemoved": "Your reaction has been removed."
 }
diff --git a/lib/i18n/app_zh.arb b/lib/i18n/app_zh.arb
index cca4b8c..81e58d9 100644
--- a/lib/i18n/app_zh.arb
+++ b/lib/i18n/app_zh.arb
@@ -13,6 +13,7 @@
   "edit": "编辑",
   "delete": "删除",
   "action": "操作",
+  "cancel": "取消",
   "report": "举报",
   "reaction": "反应",
   "reactVerb": "作出反应",
@@ -27,6 +28,7 @@
   "postIdentityNotify": "你将会以该身份发表本帖子",
   "postContentPlaceholder": "发生什么事了？！",
   "postDeleteConfirm": "你确定要删除这篇帖子吗？这意味着这个帖子将永远被我们丢弃在硬盘海中！该操作不可被反转！",
+  "postEditNotify": "你正在修改一个已经发布了的帖子。",
   "reactionAdded": "你的反应已被添加。",
   "reactionRemoved": "你的反应已被移除。"
 }
\ No newline at end of file
diff --git a/lib/screens/posts/comment_editor.dart b/lib/screens/posts/comment_editor.dart
index e13a7e9..e76d9eb 100644
--- a/lib/screens/posts/comment_editor.dart
+++ b/lib/screens/posts/comment_editor.dart
@@ -79,6 +79,12 @@ class _CommentEditorScreenState extends State<CommentEditorScreen> {
     setState(() => _isSubmitting = false);
   }
 
+  void cancelEditing() {
+    if (Navigator.canPop(context)) {
+      Navigator.pop(context);
+    }
+  }
+
   @override
   void initState() {
     if (widget.editing != null) {
@@ -94,6 +100,20 @@ class _CommentEditorScreenState extends State<CommentEditorScreen> {
   Widget build(BuildContext context) {
     final auth = context.read<AuthProvider>();
 
+    final editingBanner = MaterialBanner(
+      padding: const EdgeInsets.symmetric(vertical: 8, horizontal: 20),
+      leading: const Icon(Icons.edit_note),
+      backgroundColor: const Color(0xFFE0E0E0),
+      dividerColor: const Color.fromARGB(1, 0, 0, 0),
+      content: Text(AppLocalizations.of(context)!.postEditNotify),
+      actions: [
+        TextButton(
+          child: Text(AppLocalizations.of(context)!.cancel),
+          onPressed: () => cancelEditing(),
+        ),
+      ],
+    );
+
     return IndentWrapper(
       hideDrawer: true,
       title: AppLocalizations.of(context)!.newComment,
@@ -146,6 +166,7 @@ class _CommentEditorScreenState extends State<CommentEditorScreen> {
                   ),
                 ),
               ),
+              widget.editing != null ? editingBanner : Container(),
               Container(
                 decoration: const BoxDecoration(
                   border: Border(
diff --git a/lib/screens/posts/moment_editor.dart b/lib/screens/posts/moment_editor.dart
index 7179a67..dc92296 100644
--- a/lib/screens/posts/moment_editor.dart
+++ b/lib/screens/posts/moment_editor.dart
@@ -69,6 +69,12 @@ class _MomentEditorScreenState extends State<MomentEditorScreen> {
     setState(() => _isSubmitting = false);
   }
 
+  void cancelEditing() {
+    if (Navigator.canPop(context)) {
+      Navigator.pop(context);
+    }
+  }
+
   @override
   void initState() {
     if (widget.editing != null) {
@@ -84,6 +90,20 @@ class _MomentEditorScreenState extends State<MomentEditorScreen> {
   Widget build(BuildContext context) {
     final auth = context.read<AuthProvider>();
 
+    final editingBanner = MaterialBanner(
+      padding: const EdgeInsets.symmetric(vertical: 8, horizontal: 20),
+      leading: const Icon(Icons.edit_note),
+      backgroundColor: const Color(0xFFE0E0E0),
+      dividerColor: const Color.fromARGB(1, 0, 0, 0),
+      content: Text(AppLocalizations.of(context)!.postEditNotify),
+      actions: [
+        TextButton(
+          child: Text(AppLocalizations.of(context)!.cancel),
+          onPressed: () => cancelEditing(),
+        ),
+      ],
+    );
+
     return IndentWrapper(
       hideDrawer: true,
       title: AppLocalizations.of(context)!.newMoment,
@@ -121,8 +141,7 @@ class _MomentEditorScreenState extends State<MomentEditorScreen> {
               const Divider(thickness: 0.3),
               Expanded(
                 child: Container(
-                  padding:
-                      const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                  padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                   child: TextField(
                     maxLines: null,
                     autofocus: true,
@@ -130,12 +149,12 @@ class _MomentEditorScreenState extends State<MomentEditorScreen> {
                     keyboardType: TextInputType.multiline,
                     controller: _textController,
                     decoration: InputDecoration.collapsed(
-                      hintText:
-                          AppLocalizations.of(context)!.postContentPlaceholder,
+                      hintText: AppLocalizations.of(context)!.postContentPlaceholder,
                     ),
                   ),
                 ),
               ),
+              widget.editing != null ? editingBanner : Container(),
               Container(
                 decoration: const BoxDecoration(
                   border: Border(