diff --git a/business/jxstore/event/event_tcp.go b/business/jxstore/event/event_tcp.go
index c2f4242f4..ba73edf56 100644
--- a/business/jxstore/event/event_tcp.go
+++ b/business/jxstore/event/event_tcp.go
@@ -298,16 +298,20 @@ func (t *TcpClient) doPrint2(printMsgChan chan *model.PrintMsg) (err error) {
 func (t *TcpClient) HandleCheckTcpHeart() {
 	for {
 		keys := []string{}
+		t.RLock()
 		for k, v := range t.Clients {
 			if time.Now().Sub(v.StatusTime) > time.Minute+time.Second {
 				v.Status = printerStatusOffline
 				keys = append(keys, k)
 			}
 		}
+		t.RUnlock()
 		for _, v := range keys {
 			changePrinterStatus(v, printerStatusOffline)
-			if t.Clients[v] != nil {
+			if t.isExist(v) {
+				t.Lock()
 				delete(t.Clients, v)
+				t.Unlock()
 			}
 		}
 	}
diff --git a/business/jxstore/event/event_tcp_utils.go b/business/jxstore/event/event_tcp_utils.go
index 40f0d8d85..f6fef65ce 100644
--- a/business/jxstore/event/event_tcp_utils.go
+++ b/business/jxstore/event/event_tcp_utils.go
@@ -86,7 +86,6 @@ const (
 
 var (
 	//t = &TcpClient{}
-
 	printErrMap = map[string]string{
 		printErrWithoutPaper: "打印机缺纸！",
 	}