diff --git a/APP_Framework/lib/mqtt/platform_mqtt.h b/APP_Framework/lib/mqtt/platform_mqtt.h
index c08ba3447..c8c758f85 100644
--- a/APP_Framework/lib/mqtt/platform_mqtt.h
+++ b/APP_Framework/lib/mqtt/platform_mqtt.h
@@ -25,7 +25,7 @@
 #include <stdint.h>
 
 #define  KEEPALIVE_TIME 300    //保活时间(单位s),300s
-#define  HEART_TIME  120000    //空闲时发送心跳包的时间间隔(单位ms),120s
+#define  HEART_TIME  200000    //空闲时发送心跳包的时间间隔(单位ms),200s
 #define  PACK_SIZE      512    //存放报文数据缓冲区大小
 #define  CMD_SIZE      3072    //保存推送的PUBLISH报文中的数据缓冲区大小
 #define  CLIENTID_SIZE   64    //存放客户端ID的缓冲区大小
diff --git a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
index 5d95c08ed..658923efc 100644
--- a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
+++ b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
@@ -824,7 +824,18 @@ reconnect:
         datalen = MQTT_Recv(MqttRxbuf, sizeof(MqttRxbuf));
         if(datalen <= 0)
         {
-           freecnt++; 
+            freecnt++; 
+            if((freecnt >= 20) && (CalculateTimeMsFromTick(CurrentTicksGain()) - heart_time >= HEART_TIME)) //连续20次未收到数据默认为为空闲状态,需每隔一段时间发送需要发送心跳包保活
+            {
+                heart_time = CalculateTimeMsFromTick(CurrentTicksGain());
+                freecnt = 0;
+                if(MQTT_SendHeart() != 0) //发送心跳包失败可能连接断开,需要重连
+                {
+                    KPrintf("The connection has been disconnected, reconnecting!\n");
+                    goto reconnect;  
+                }
+                KPrintf("Send heartbeat packet successful!\n"); 
+            }
         }
         else if(MqttRxbuf[0] == 0x30)
         {
@@ -916,19 +927,6 @@ reconnect:
             freecnt = 0;
             continue;
         }
-
-        if((freecnt >= 10) && (CalculateTimeMsFromTick(CurrentTicksGain()) - heart_time >= HEART_TIME)) //连续10次未收到数据默认为为空闲状态,需每隔一段时间发送需要发送心跳包保活
-        {
-            heart_time = CalculateTimeMsFromTick(CurrentTicksGain());
-            if(MQTT_SendHeart() != 0) //发送心跳包失败可能连接断开,需要重连
-            {
-                KPrintf("The connection has been disconnected, reconnecting!\n");
-                freecnt = 0;
-                heart_time = 0;
-                goto reconnect;  
-            }
-            KPrintf("Send heartbeat packet successful!\n"); 
-        }
     }
 
     if(0 == ret)
@@ -1053,7 +1051,18 @@ reconnect:
         datalen = MQTT_Recv(MqttRxbuf, sizeof(MqttRxbuf));
         if(datalen <= 0)
         {
-           freecnt++; 
+            freecnt++;
+            if((freecnt >= 20) && (CalculateTimeMsFromTick(CurrentTicksGain()) - heart_time >= HEART_TIME)) //连续20次未收到数据默认为为空闲状态,需每隔一段时间发送需要发送心跳包保活
+            {
+                heart_time = CalculateTimeMsFromTick(CurrentTicksGain());
+                freecnt = 0;
+                if(MQTT_SendHeart() != 0) //发送心跳包失败可能连接断开,需要重连
+                {
+                    KPrintf("The connection has been disconnected, reconnecting!\n");
+                    goto reconnect;  
+                }
+                KPrintf("Send heartbeat packet successful!\n"); 
+            }
         }
         else if(MqttRxbuf[0] == 0x30)
         {
@@ -1144,19 +1153,6 @@ reconnect:
             freecnt = 0;
             continue;
         }
-
-        if((freecnt >= 10) && (CalculateTimeMsFromTick(CurrentTicksGain()) - heart_time >= HEART_TIME)) //连续10次未收到数据默认为为空闲状态,需每隔一段时间发送需要发送心跳包保活
-        {
-            heart_time = CalculateTimeMsFromTick(CurrentTicksGain());
-            if(MQTT_SendHeart() != 0) //发送心跳包失败可能连接断开,需要重连
-            {
-                KPrintf("The connection has been disconnected, reconnecting!\n");
-                freecnt = 0;
-                heart_time = 0;
-                goto reconnect;  
-            }
-            KPrintf("Send heartbeat packet successful!\n"); 
-        }
     }
 
     if(0 == ret)