diff --git a/frontend/mobile-app/lib/features/home/presentation/pages/home_shell_page.dart b/frontend/mobile-app/lib/features/home/presentation/pages/home_shell_page.dart
index 108e489c..0eefda0b 100644
--- a/frontend/mobile-app/lib/features/home/presentation/pages/home_shell_page.dart
+++ b/frontend/mobile-app/lib/features/home/presentation/pages/home_shell_page.dart
@@ -83,12 +83,12 @@ class _HomeShellPageState extends ConsumerState<HomeShellPage>
     _scheduleNextContractCheck();
   }
 
-  /// 安排下一次合同检查（随机 60-180 秒）
+  /// 安排下一次合同检查（随机 5-20 秒）
   void _scheduleNextContractCheck() {
     _contractCheckTimer?.cancel();
 
-    // 随机 60-180 秒（1-3分钟）
-    final randomSeconds = 60 + Random().nextInt(121); // 60 + 0~120 = 60~180
+    // 随机 5-20 秒
+    final randomSeconds = 5 + Random().nextInt(16); // 5 + 0~15 = 5~20
     debugPrint('[HomeShellPage] 下次合同检查将在 $randomSeconds 秒后执行');
 
     _contractCheckTimer = Timer(Duration(seconds: randomSeconds), () async {