diff --git a/backend/services/presence-service/src/domain/value-objects/time-window.vo.ts b/backend/services/presence-service/src/domain/value-objects/time-window.vo.ts
index b09463bf..ed5cedae 100644
--- a/backend/services/presence-service/src/domain/value-objects/time-window.vo.ts
+++ b/backend/services/presence-service/src/domain/value-objects/time-window.vo.ts
@@ -1,5 +1,5 @@
 export class TimeWindow {
-  static readonly DEFAULT_ONLINE_WINDOW_SECONDS = 180; // 3分钟
+  static readonly DEFAULT_ONLINE_WINDOW_SECONDS = 300; // 5分钟（行业标准）
   static readonly DEFAULT_HEARTBEAT_INTERVAL_SECONDS = 60; // 60秒
 
   private readonly _windowSeconds: number;