diff --git a/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f10x.c b/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f10x.c
index 5fc4c604b0..b6f66ec37e 100644
--- a/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f10x.c
+++ b/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f10x.c
@@ -73,7 +73,7 @@ static rt_err_t ch32_wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
             IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
             IWDG_SetPrescaler(wdt_dev->Prescaler);
             IWDG_SetReload(wdt_dev->Reload);
-            IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
+            IWDG_ReloadCounter();
             IWDG_Enable();
         }
         break;
@@ -97,7 +97,7 @@ static rt_err_t ch32_wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
         IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
         IWDG_SetPrescaler(wdt_dev->Prescaler);
         IWDG_SetReload(wdt_dev->Reload);
-        IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
+        IWDG_ReloadCounter();
         IWDG_Enable();
         wdt_dev->is_start = 1;
 
diff --git a/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f20x.c b/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f20x.c
index 1d2a03fa5c..70fff256e6 100644
--- a/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f20x.c
+++ b/bsp/wch/arm/Libraries/ch32_drivers/drv_iwdt_ch32f20x.c
@@ -73,7 +73,7 @@ static rt_err_t ch32_wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
             IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
             IWDG_SetPrescaler(wdt_dev->Prescaler);
             IWDG_SetReload(wdt_dev->Reload);
-            IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
+            IWDG_ReloadCounter();
             IWDG_Enable();
         }
         break;
@@ -97,7 +97,7 @@ static rt_err_t ch32_wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
         IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
         IWDG_SetPrescaler(wdt_dev->Prescaler);
         IWDG_SetReload(wdt_dev->Reload);
-        IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
+        IWDG_ReloadCounter();
         IWDG_Enable();
         wdt_dev->is_start = 1;