diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
index e42409f..eb18c3d 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
@@ -29,6 +29,7 @@
 #include "cmcng.h"
 #include "dbn_ble_srv.h"
 #include "CH59x_pwm.h"
+#include "CH59x_sys.h"     /* WWDG 看门狗 */
 #include "rs485_700bs.h"
 #include "rs485_modbus.h"
 
@@ -103,6 +104,9 @@ uint8_t g_rs485_id = 0;
 #define  BREATH_OPTO_DUTY_STEP  32         // 步长 4x → 渐亮/渐灭各 4 步 (~0.5s 周期)
 #define  BREATH_OPTO_HOLD_TICKS 1          // 保持 50ms
 
+/* 看门狗超时: Fsys=60MHz, WDOG_CLK=Fsys/131072≈458Hz, 0xFF≈558ms */
+#define  WDOG_TIMEOUT          0xFF
+
 static uint8_t  g_breath_phase = BREATH_FADE_IN;
 static uint8_t  g_breath_duty  = 0;
 static uint8_t  g_breath_tick  = 0;
@@ -1056,6 +1060,8 @@ void Main_Circulation()
                 g_dbn_ble_state_acs_enable.enable = 0;
             }
         }
+
+        WWDG_SetCounter(WDOG_TIMEOUT);   // 喂狗
     }
 }
 
@@ -1099,6 +1105,11 @@ int main(void)
     HAL_Init();
     GAPRole_PeripheralInit();
     Peripheral_Init();
+
+    /* 使能看门狗复位: 超时 ~558ms, 主循环喂狗 */
+    WWDG_ResetCfg(ENABLE);
+    WWDG_SetCounter(WDOG_TIMEOUT);
+
     Main_Circulation();
 }