diff --git a/uart/uart.cpp b/uart/uart.cpp
index cdb39b9..49a4536 100644
--- a/uart/uart.cpp
+++ b/uart/uart.cpp
@@ -38,7 +38,7 @@ int Uart::UartRecv(int fd, char srcshow, char *buffer) {
     int timeoutflag = 0;
     char head[] = {0xAA, 0x55, 0xAA};
     char szbuffer[BUF_LENGTH] = {0x00};
-    while (1 && !bUpdate) {
+    while (1 && !bUpdate && !alarmFlag) {
         if (now_task == WAVE_CMD) {
             memset(buff, 0, sizeof(buff));
             ret = read_data(fd, buff, BUF_LENGTH, 10);