diff --git a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
index f86bec672..2d4634cb9 100644
--- a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
+++ b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
@@ -495,6 +495,12 @@ static int ota_data_recv(struct Adapter* adapter)
         ret = AdapterDeviceRecv(adapter, &recv_msg, sizeof(struct ota_data));
         if(ret >= 0 && recv_msg.header.frame_flag == 0x5A5A) 
         {
+            if(0 == strncmp("aiit_ota_start",recv_msg.frame.frame_data, strlen("aiit_ota_start"))) 
+            {
+                //这里不应该再出现开始信号,丢弃当前数据继续接收
+                continue;
+            }
+            
             if(0 == strncmp("aiit_ota_end",recv_msg.frame.frame_data, strlen("aiit_ota_end"))) //说明当前是结束帧
             {
                 printf("total [%d]frames [%d]Bytes crc[%x],receive successful,\n",frame_cnt,recv_msg.header.total_len,recv_msg.frame.crc);