diff --git a/Models/TimerClass.cs b/Models/TimerClass.cs
index a1610ad..41e4580 100644
--- a/Models/TimerClass.cs
+++ b/Models/TimerClass.cs
@@ -40,6 +40,9 @@ namespace AutoNotificatPhone.Models
 
         // Kafka 心跳超时阈值（分钟）
         private const int KafkaStaleMinutes = 5;
+        // 数据库备份窗口（北京时间 3:00-4:00），该时段跳过心跳检查
+        private const int KafkaCheckSkipStartHour = 3;
+        private const int KafkaCheckSkipEndHour = 4;
         // 数据库连接失败累计到 N 次才触发一次告警，避免告警风暴
         private const int KafkaDbAlertTriggerCount = 8;
 
@@ -499,6 +502,13 @@ namespace AutoNotificatPhone.Models
         {
             try
             {
+                // 北京时间 3:00-4:00 为数据库备份窗口，此时不做心跳检查，避免误报
+                var beijingTime = DateTime.UtcNow.AddHours(8);
+                if (beijingTime.Hour >= KafkaCheckSkipStartHour && beijingTime.Hour < KafkaCheckSkipEndHour)
+                {
+                    return;
+                }
+
                 // 从配置构建连接串
                 var connectionString = BuildPostgresConnectionString();
                 if (string.IsNullOrWhiteSpace(connectionString))