diff --git a/frontend/mining-app/lib/presentation/pages/auth/login_page.dart b/frontend/mining-app/lib/presentation/pages/auth/login_page.dart
index 22131464..2a681885 100644
--- a/frontend/mining-app/lib/presentation/pages/auth/login_page.dart
+++ b/frontend/mining-app/lib/presentation/pages/auth/login_page.dart
@@ -86,12 +86,13 @@ class _LoginPageState extends ConsumerState<LoginPage> {
           },
         );
       } else if (message.contains('还剩')) {
-        // 密码错误但还有机会 → SnackBar 提醒 + 找回密码入口
-        ScaffoldMessenger.of(context).showSnackBar(
+        // 密码错误但还有机会 → SnackBar 提醒 + 找回密码入口（4秒后强制关闭）
+        final messenger = ScaffoldMessenger.of(context);
+        messenger.showSnackBar(
           SnackBar(
             content: Text(message),
             backgroundColor: Colors.orange.shade800,
-            duration: const Duration(seconds: 5),
+            duration: const Duration(seconds: 4),
             action: SnackBarAction(
               label: '找回密码',
               textColor: Colors.white,
@@ -99,10 +100,15 @@ class _LoginPageState extends ConsumerState<LoginPage> {
             ),
           ),
         );
+        Future.delayed(const Duration(seconds: 4), () {
+          messenger.hideCurrentSnackBar();
+        });
       } else {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(message)),
-        );
+        final messenger = ScaffoldMessenger.of(context);
+        messenger.showSnackBar(SnackBar(content: Text(message)));
+        Future.delayed(const Duration(seconds: 3), () {
+          messenger.hideCurrentSnackBar();
+        });
       }
     }
   }