diff --git a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/service/gb28181/keepalive/KeepaliveService.java b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/service/gb28181/keepalive/KeepaliveService.java
index 69acb49..2aeadc7 100644
--- a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/service/gb28181/keepalive/KeepaliveService.java
+++ b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/service/gb28181/keepalive/KeepaliveService.java
@@ -49,5 +49,6 @@ public class KeepaliveService {
         if(scheduledFuture != null){
             scheduledFuture.cancel(true);
         }
+        map.remove(mockingDevice.getDeviceCode());
     }
 }