diff --git a/code/application/source/cardv/SrcCode/System/SysMain_Exe.c b/code/application/source/cardv/SrcCode/System/SysMain_Exe.c
index a13a8cc02..3817ee8da 100755
--- a/code/application/source/cardv/SrcCode/System/SysMain_Exe.c
+++ b/code/application/source/cardv/SrcCode/System/SysMain_Exe.c
@@ -156,7 +156,7 @@ INT32 System_GetBootFirstMode(void)
 		printf("%s:%d CamMode :%d\n", __FUNCTION__, __LINE__,puiPara->CamMode);
         if(GxUSB_GetIsUSBPlug())
         {
-            return PRIMARY_MODE_USBMSDC;
+            return PRIMARY_MODE_TRANSCODE;//PRIMARY_MODE_USBMSDC;
         }
         else if((PWR_ON_SETUP != PowerOnMode) && (PWR_ON_MCU_UPDATA != PowerOnMode)/*|| (sf_get_fw_update())*/)
         {