diff --git a/components/drivers/include/ipc/workqueue.h b/components/drivers/include/ipc/workqueue.h
index a156145641..03904d852e 100644
--- a/components/drivers/include/ipc/workqueue.h
+++ b/components/drivers/include/ipc/workqueue.h
@@ -5,6 +5,7 @@
  *
  * Change Logs:
  * Date           Author       Notes
+ * 2021-08-01     Meco Man     remove rt_delayed_work_init() and rt_delayed_work structure
  */
 #ifndef WORKQUEUE_H__
 #define WORKQUEUE_H__
@@ -48,11 +49,6 @@ struct rt_work
     struct rt_workqueue *workqueue;
 };
 
-struct rt_delayed_work
-{
-    struct rt_work work;
-};
-
 #ifdef RT_USING_HEAP
 /**
  * WorkQueue for DeviceDriver
@@ -82,9 +78,6 @@ rt_inline void rt_work_init(struct rt_work *work, void (*work_func)(struct rt_wo
     work->type = 0;
 }
 
-void rt_delayed_work_init(struct rt_delayed_work *work, void (*work_func)(struct rt_work *work,
-                          void *work_data), void *work_data);
-
 #endif /* RT_USING_HEAP */
 
 #endif
diff --git a/components/drivers/src/workqueue.c b/components/drivers/src/workqueue.c
index 065c505015..8fcfd52688 100644
--- a/components/drivers/src/workqueue.c
+++ b/components/drivers/src/workqueue.c
@@ -5,7 +5,8 @@
  *
  * Change Logs:
  * Date           Author       Notes
- * 2017-02-27     bernard      fix the re-work issue.
+ * 2017-02-27     Bernard      fix the re-work issue.
+ * 2021-08-01     Meco Man     remove rt_delayed_work_init()
  */
 
 #include <rthw.h>
@@ -339,12 +340,6 @@ rt_err_t rt_workqueue_cancel_all_work(struct rt_workqueue *queue)
     return RT_EOK;
 }
 
-void rt_delayed_work_init(struct rt_delayed_work *work, void (*work_func)(struct rt_work *work,
-                          void *work_data), void *work_data)
-{
-    rt_work_init(&work->work, work_func, work_data);
-}
-
 #ifdef RT_USING_SYSTEM_WORKQUEUE
 static struct rt_workqueue *sys_workq;
 
diff --git a/components/net/sal_socket/src/sal_socket.c b/components/net/sal_socket/src/sal_socket.c
index dd3c5d3dc2..7b33038d17 100644
--- a/components/net/sal_socket/src/sal_socket.c
+++ b/components/net/sal_socket/src/sal_socket.c
@@ -165,7 +165,6 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
     struct netdev *netdev = (struct netdev *)work_data;
     socklen_t addr_len = sizeof(struct sockaddr_in);
     char send_data[SAL_INTERNET_BUFF_LEN], recv_data = 0;
-    struct rt_delayed_work *delay_work = (struct rt_delayed_work *)work;
 
     const char month[][SAL_INTERNET_MONTH_LEN] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
     char date[SAL_INTERNET_DATE_LEN];
@@ -176,7 +175,7 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
 
     if (work)
     {
-        rt_free(delay_work);
+        rt_free(work);
     }
 
     /* get network interface socket operations */
@@ -287,18 +286,18 @@ int sal_check_netdev_internet_up(struct netdev *netdev)
 
 #ifdef SAL_INTERNET_CHECK
     /* workqueue for network connect */
-    struct rt_delayed_work *net_work = RT_NULL;
+    struct rt_work *net_work = RT_NULL;
 
 
-    net_work = (struct rt_delayed_work *)rt_calloc(1, sizeof(struct rt_delayed_work));
+    net_work = (struct rt_work *)rt_calloc(1, sizeof(struct rt_work));
     if (net_work == RT_NULL)
     {
         LOG_W("No memory for network interface device(%s) delay work.", netdev->name);
         return -1;
     }
 
-    rt_delayed_work_init(net_work, check_netdev_internet_up_work, (void *)netdev);
-    rt_work_submit(&(net_work->work), RT_TICK_PER_SECOND);
+    rt_work_init(net_work, check_netdev_internet_up_work, (void *)netdev);
+    rt_work_submit(net_work, RT_TICK_PER_SECOND);
 #endif /* SAL_INTERNET_CHECK */
     return 0;
 }
@@ -619,7 +618,7 @@ int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
             LOG_E("New socket registered failed, return error %d.", retval);
             return -1;
         }
-		
+
         /* new socket create by accept should have the same netdev with server*/
         new_sock->netdev = sock->netdev;
         /* socket structure user_data used to store the acquired new socket */
@@ -1176,4 +1175,3 @@ void sal_freeaddrinfo(struct addrinfo *ai)
         pf->netdb_ops->freeaddrinfo(ai);
     }
 }
-