diff --git a/Ubiquitous/XiZi_IIoT/board/xidatong-arm32/third_party_driver/sdio/connect_sdio.c b/Ubiquitous/XiZi_IIoT/board/xidatong-arm32/third_party_driver/sdio/connect_sdio.c
index ee7daf13a..5397da037 100644
--- a/Ubiquitous/XiZi_IIoT/board/xidatong-arm32/third_party_driver/sdio/connect_sdio.c
+++ b/Ubiquitous/XiZi_IIoT/board/xidatong-arm32/third_party_driver/sdio/connect_sdio.c
@@ -274,6 +274,8 @@ static struct SdioDevDone dev_done =
     SdioRead,
 };
 
+static bool is_mount_ok = false;
+
 #if defined(FS_VFS) && defined(MOUNT_SDCARD_FS)
 #include <iot-vfs.h>
 
@@ -283,11 +285,14 @@ static struct SdioDevDone dev_done =
  */
 static int MountSDCardFs(enum FilesystemType fs_type)
 {
-    if (MountFilesystem(SDIO_BUS_NAME, SDIO_DEVICE_NAME, SDIO_DRIVER_NAME, fs_type, "/") == 0)
+    if (MountFilesystem(SDIO_BUS_NAME, SDIO_DEVICE_NAME, SDIO_DRIVER_NAME, fs_type, "/") == 0){
         KPrintf("Sd card mount to '/'");
-    else
+        is_mount_ok = true;
+    } else {
         KPrintf("Sd card mount to '/' failed!");
-    
+        is_mount_ok = false;
+    }
+
     return 0;
 }
 #endif
@@ -329,6 +334,7 @@ static void SdCardDetach(void)
 
 #ifdef MOUNT_SDCARD_FS
     UnmountFileSystem("/");
+    is_mount_ok = false;
 #endif
 }
 
@@ -350,9 +356,10 @@ static uint8 SdCardReadCd(void)
     return BusDevReadData(pin->owner_haldev, &read_param);
 }
 
-static int sd_card_status = 0;
 static void SdCardTask(void* parameter)
 {
+    static int sd_card_status = 0;
+
     while (1) {
         if (!SdCardReadCd()) {
             if (!sd_card_status) {
@@ -368,11 +375,6 @@ static void SdCardTask(void* parameter)
     }
 }
 
-int GetSdCardStatus(void)
-{
-    return sd_card_status;
-}
-
 #ifdef MOUNT_SDCARD
 int MountSDCard()
 {
@@ -390,6 +392,13 @@ int MountSDCard()
 }
 #endif
 
+bool GetSdMountStatus(void)
+{
+    if(!is_mount_ok) 
+        KPrintf("The SD card was not mounted successfully or not inserted, please check!\r\n");
+    return is_mount_ok;
+}
+
 int Imxrt1052HwSdioInit(void)
 {
     x_err_t ret = EOK;
diff --git a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
index eb3eb4d8e..42495fc86 100644
--- a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
+++ b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
@@ -874,7 +874,7 @@ static void mqttCloudInteraction(void* parameter)
 reconnect:
     if((AdapterNetActive() == 0) && MQTT_Connect() && MQTT_SubscribeTopic(topicdatabuff[0]) && MQTT_SubscribeTopic(topicdatabuff[1]))
     {
-        KPrintf("Log in to the cloud platform and subscribe to the ota topic successfully.\n"); 
+        KPrintf("Log in to the cloud platform and subscribe to the topic successfully.\n"); 
         PropertyVersion();
     }
     else
@@ -888,9 +888,9 @@ reconnect:
     uint8_t jsonfilename[32];
     memset(jsontopicdatabuff,0,sizeof(jsontopicdatabuff));
     sprintf(jsontopicdatabuff,"protocol/%s/files",CLIENTID);
-    if(MQTT_SubscribeTopic(jsontopicdatabuff))
+    if(!MQTT_SubscribeTopic(jsontopicdatabuff))
     {
-        KPrintf("subscribe to the json download topic successfully.\n"); 
+        KPrintf("subscribe to the json download topic failed!\n"); 
     }
 #endif
 
@@ -1015,8 +1015,8 @@ reconnect:
             }
 #ifdef USING_DOWNLOAD_JSON
             // 3.下载json文件,SD卡要确保已经插入
-            extern int GetSdCardStatus(void);
-            if(strstr((char *)Platform_mqtt.cmdbuff,jsontopicdatabuff) && GetSdCardStatus())
+            extern bool GetSdMountStatus(void);
+            if(strstr((char *)Platform_mqtt.cmdbuff,jsontopicdatabuff) && GetSdMountStatus())
             {
                 KPrintf("------Start download joson file !------\r\n");
                 memset(jsonfilename,0,sizeof(jsonfilename));
@@ -1079,8 +1079,6 @@ reconnect:
     {
         KPrintf("firmware file transfer failed,start reboot!\n");
     }
-    MQTT_UnSubscribeTopic(topicdatabuff[0]);
-    MQTT_UnSubscribeTopic(topicdatabuff[1]);
     MQTT_Disconnect();
     mcuboot.flash_deinit();
     MdelayKTask(2000);
@@ -1319,7 +1317,6 @@ reconnect:
     {
         KPrintf("firmware file transfer failed,start reboot!\n");
     }
-    MQTT_UnSubscribeTopic(topicdatabuff);
     MQTT_Disconnect();
     mcuboot.flash_deinit();
     MdelayKTask(2000);