diff --git a/business/jxstore/event/event_tcp_utils.go b/business/jxstore/event/event_tcp_utils.go
index edd9a4b27..c18886ad4 100644
--- a/business/jxstore/event/event_tcp_utils.go
+++ b/business/jxstore/event/event_tcp_utils.go
@@ -646,7 +646,7 @@ func Heartbeat(c net.Conn, t *TcpClient, data string, printNo string, printRemot
 	//4、读打印channel并打印，并切等待回调channel中的消息
 	//5、修改数据库中打印机状态（没在连接池中说明是重新连接的）
 	//6、监听心跳时间，超过1分多钟就clear掉
-	if t.getClients(printNo) == nil {
+	if t.getClients(printNo) == nil || t == nil {
 		addConn(c, t, printNo, status)
 		buildAllMap(t, printNo)
 		//t.TimeoutMap[printNo] <- true