diff --git a/src/main/io/serial_4way_avrootloader.c b/src/main/io/serial_4way_avrootloader.c
index 513c2538d..788a94571 100644
--- a/src/main/io/serial_4way_avrootloader.c
+++ b/src/main/io/serial_4way_avrootloader.c
@@ -164,11 +164,19 @@ static uint8_t BL_ReadBuf(uint8_t *pstring, uint8_t len)
  *  后继处理： 测试通过后，尝试atomic_block(nvic_prio_max) 方式
  */
 #if defined(AT32F43x)
-    ATOMIC_BLOCK(NVIC_PRIO_MAX){
-        //disable exint
-        ExIntReg=EXINT->inten;
-        EXINT->inten=0;//DISABLE ALL EXINT
-    }
+    //disable exint
+    ExIntReg=EXINT->inten;
+    EXINT->inten=0;//DISABLE ALL EXINT
+    //disable 5-15 EXINT
+    NVIC_DisableIRQ(EXINT9_5_IRQn);
+    NVIC_DisableIRQ(EXINT15_10_IRQn);
+    //disable USB
+    NVIC_DisableIRQ(TMR20_OVF_IRQn);
+    NVIC_DisableIRQ(OTGFS1_IRQn);
+    //disable uart 1\2\3
+    NVIC_DisableIRQ(USART1_IRQn);
+    NVIC_DisableIRQ(USART2_IRQn);
+    NVIC_DisableIRQ(USART3_IRQn);
 #endif
     do {
         if (!suart_getc_(pstring)) goto timeout;
@@ -190,10 +198,17 @@ static uint8_t BL_ReadBuf(uint8_t *pstring, uint8_t len)
     }
 timeout:
 #if defined(AT32F43x)
-    ATOMIC_BLOCK(NVIC_PRIO_MAX){
-        //re-enable exint
-        EXINT->inten=ExIntReg;
-	}
+    //re-enable exint
+    EXINT->inten=ExIntReg;
+    NVIC_EnableIRQ(EXINT9_5_IRQn);
+    NVIC_EnableIRQ(EXINT15_10_IRQn);
+    //re-enable USB
+    NVIC_EnableIRQ(TMR20_OVF_IRQn);//TODO:tmr20 should be removed after
+    NVIC_EnableIRQ(OTGFS1_IRQn);
+    //re-enable uart 1\2\3
+    NVIC_EnableIRQ(USART1_IRQn);
+    NVIC_EnableIRQ(USART2_IRQn);
+    NVIC_EnableIRQ(USART3_IRQn);
 #endif
     return (LastACK == brSUCCESS);
 }