diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/watchdog/watchdog.md b/rt-thread-version/rt-thread-standard/programming-manual/device/watchdog/watchdog.md
index 363d9b8a7e106b8fc3182acc8d004fbf3e64505d..12aa1d33284311cadf45293c4acd2496faace8aa 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/watchdog/watchdog.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/watchdog/watchdog.md
@@ -203,7 +203,8 @@ static int wdt_sample(int argc, char *argv[])
         rt_kprintf("find %s failed!\n", device_name);
         return RT_ERROR;
     }
-
+    /* 初始化设备 */
+     rt_device_init(wdg_dev);
     /* 设置看门狗溢出时间 */
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)