diff --git a/Ink Canvas/App.xaml.cs b/Ink Canvas/App.xaml.cs
index 4aaadbeb..7c223af0 100644
--- a/Ink Canvas/App.xaml.cs	
+++ b/Ink Canvas/App.xaml.cs	
@@ -1195,6 +1195,7 @@ namespace Ink_Canvas
         private static DateTime startupCompleteHeartbeat = DateTime.MinValue;
         private static DateTime splashScreenStartTime = DateTime.MinValue;
         private static DateTime appStartupStartTime = DateTime.MinValue;
+        private static readonly TimeSpan StartupTimeout = TimeSpan.FromMinutes(2);
 
         /// <summary>
         /// 启动并管理应用的心跳与守护检查定时器，监测启动阶段与主线程是否无响应，并在符合配置的情况下尝试静默重启应用。
@@ -1218,6 +1219,8 @@ namespace Ink_Canvas
 
             watchdogTimer = new Timer(_ =>
             {
+                var now = DateTime.Now;
+
                 if (IsOobeShowing)
                     return;
 
@@ -1226,8 +1229,8 @@ namespace Ink_Canvas
                     DateTime startTime = _isSplashScreenShown && splashScreenStartTime != DateTime.MinValue 
                         ? splashScreenStartTime 
                         : appStartupStartTime;
-                    TimeSpan elapsedSinceStart = DateTime.Now - startTime;
-                    if (elapsedSinceStart.TotalMinutes >= 2)
+                    TimeSpan elapsedSinceStart = now - startTime;
+                    if (elapsedSinceStart >= StartupTimeout)
                     {
                         string timeType = _isSplashScreenShown ? "启动画面已显示" : "应用启动开始";
                         LogHelper.WriteLogToFile($"检测到启动假死：{timeType}{elapsedSinceStart.TotalMinutes:F2}分钟，但未收到启动完成心跳，自动重启。", LogHelper.LogType.Error);
@@ -1253,8 +1256,11 @@ namespace Ink_Canvas
                     }
                 }
                 
-                if (isStartupComplete && (DateTime.Now - lastHeartbeat).TotalSeconds > 10)
+                if (isStartupComplete && (now - lastHeartbeat).TotalSeconds > 10)
                 {
+                    if (appStartupStartTime != DateTime.MinValue && (now - appStartupStartTime) < StartupTimeout)
+                        return;
+
                     LogHelper.NewLog("检测到主线程无响应，自动重启。");
                     SyncCrashActionFromSettings();
                     if (CrashAction == CrashActionType.SilentRestart)