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 904da732..22131464 100644
--- a/frontend/mining-app/lib/presentation/pages/auth/login_page.dart
+++ b/frontend/mining-app/lib/presentation/pages/auth/login_page.dart
@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
@@ -57,27 +58,32 @@ class _LoginPageState extends ConsumerState<LoginPage> {
 
       ScaffoldMessenger.of(context).clearSnackBars();
       if (message.contains('锁定')) {
-        // 账户已锁定 → 弹窗 + 找回密码
+        // 账户已锁定 → 弹窗 + 找回密码（5秒后自动关闭）
         showDialog<void>(
           context: context,
-          builder: (ctx) => AlertDialog(
-            title: const Text('账户已锁定'),
-            content: Text(message),
-            actions: [
-              TextButton(
-                onPressed: () => Navigator.pop(ctx),
-                child: Text('知道了', style: TextStyle(color: AppColors.textSecondaryOf(context))),
-              ),
-              ElevatedButton(
-                onPressed: () {
-                  Navigator.pop(ctx);
-                  context.push(Routes.forgotPassword, extra: _phoneController.text.trim());
-                },
-                style: ElevatedButton.styleFrom(backgroundColor: _orange),
-                child: const Text('找回密码', style: TextStyle(color: Colors.white)),
-              ),
-            ],
-          ),
+          builder: (ctx) {
+            Timer(const Duration(seconds: 5), () {
+              if (ctx.mounted) Navigator.of(ctx, rootNavigator: true).maybePop();
+            });
+            return AlertDialog(
+              title: const Text('账户已锁定'),
+              content: Text(message),
+              actions: [
+                TextButton(
+                  onPressed: () => Navigator.pop(ctx),
+                  child: Text('知道了', style: TextStyle(color: AppColors.textSecondaryOf(context))),
+                ),
+                ElevatedButton(
+                  onPressed: () {
+                    Navigator.pop(ctx);
+                    context.push(Routes.forgotPassword, extra: _phoneController.text.trim());
+                  },
+                  style: ElevatedButton.styleFrom(backgroundColor: _orange),
+                  child: const Text('找回密码', style: TextStyle(color: Colors.white)),
+                ),
+              ],
+            );
+          },
         );
       } else if (message.contains('还剩')) {
         // 密码错误但还有机会 → SnackBar 提醒 + 找回密码入口