diff --git a/business/jxstore/event/event_tcp.go b/business/jxstore/event/event_tcp.go
index b88d70407..269d149cd 100644
--- a/business/jxstore/event/event_tcp.go
+++ b/business/jxstore/event/event_tcp.go
@@ -364,12 +364,17 @@ func HandleTcpMessages() {
 func HandleCheckTcpHeart() {
 	for {
 		tcpClient.s.Lock()
-		for _, v := range tcpClient.Clients {
+		keys := []string{}
+		for k, v := range tcpClient.Clients {
 			if time.Now().Sub(v.StatusTime) > time.Minute+time.Second {
 				v.Status = printerStatusOffline
+				keys = append(keys, k)
 			}
 		}
 		tcpClient.s.Unlock()
+		for _, v := range keys {
+			delete(tcpClient.Clients, v)
+		}
 	}
 }