diff --git a/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu.c b/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu.c
index b9eca674a..bba817877 100755
--- a/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu.c
+++ b/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu.c
@@ -964,17 +964,7 @@ unsigned char sf_commu_parse_mcu_data(unsigned char * src, unsigned int len)
         		{
                     sf_set_pir_statu_flag(0);
                     sf_set_module_sleep_flag(0);
-                    if((PWR_ON_SETUP != sf_poweron_type_get()) && (PWR_ON_USB!= sf_poweron_type_get()))
-                    {
-                        printf("[power off] %s(%d)\n", __FUNCTION__, __LINE__);
-                        sf_set_power_off_flag(1);
-                        //sf_app_battery_stop();
-                        system("watchdog -T 1 -t 5 /dev/watchdog");
-                    }
-                    else
-                    {
-                        sf_com_message_send_to_cardv(&stMessageBuf);
-                    }
+                    sf_com_message_send_to_cardv(&stMessageBuf);
                 }
                 else if(0 == stMessageBuf.arg3) //ON->OFF
                 {
diff --git a/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c b/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
index d1626dcb0..72f74ab2b 100755
--- a/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
+++ b/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
@@ -449,7 +449,7 @@ SINT32 sf_hal_ttyusb2_read_buf(SF_TTY_DATA_TYPE_S *recv)
         } 
         else if (0 == s32ret) {
             waitTime--;
-            MLOGW("FIFO select timeout [%d]\n",waitTime);
+            //MLOGW("FIFO select timeout [%d]\n",waitTime);
             continue;
         }
     }
diff --git a/code/lib/source/sifar/code/source/mcu/sf_mcu_client.c b/code/lib/source/sifar/code/source/mcu/sf_mcu_client.c
index 6569e2daa..879629655 100644
--- a/code/lib/source/sifar/code/source/mcu/sf_mcu_client.c
+++ b/code/lib/source/sifar/code/source/mcu/sf_mcu_client.c
@@ -804,14 +804,7 @@ void sf_mcu_dataready_ck(UINT8 startMode)
 			gModuleSleep = 0;                       //power off 4G module
             sf_set_power_off_flag(1);
 			printf("[power off] %s(%d)\n", __FUNCTION__, __LINE__);
-            if((startMode == 1) && (PWR_ON_AUTO == sf_cardv_convert_power_on_mode()))
-            {
-                system("watchdog -T 1 -t 5 /dev/watchdog");
-            }
-            else
-            {
-                Ux_PostEvent(NVTEVT_SYSTEM_SHUTDOWN, 1, 0); //shutdown start
-            }
+            Ux_PostEvent(NVTEVT_SYSTEM_SHUTDOWN, 1, 0); //shutdown start
 		}
 	}