diff --git a/components/net/at/at_socket/at_socket.c b/components/net/at/at_socket/at_socket.c
index d84875be3a..2973120205 100644
--- a/components/net/at/at_socket/at_socket.c
+++ b/components/net/at/at_socket/at_socket.c
@@ -439,12 +439,14 @@ static struct at_socket *alloc_socket_by_device(struct at_device *device, enum a
 #endif
 
     rt_snprintf(name, RT_NAME_MAX, "%s%d", "at_skt", idx);
-    /* create AT socket receive mailbox */
+    /* create AT socket receive semaphore */
     if ((sock->recv_notice = rt_sem_create(name, 0, RT_IPC_FLAG_FIFO)) == RT_NULL)
     {
         LOG_E("No memory socket receive notic semaphore create.");
         goto __err;
     }
+    /* set AT socket receive semaphore 'max_value' to 1 */
+    rt_sem_control(sock->recv_notice, RT_IPC_CMD_SET_VLIMIT, (void *)1);
 
     rt_snprintf(name, RT_NAME_MAX, "%s%d", "at_skt", idx);
     /* create AT socket receive ring buffer lock */
@@ -823,7 +825,7 @@ static void at_recv_notice_cb(struct at_socket *sock, at_socket_evt_t event, con
     }
     rt_mutex_release(sock->recv_lock);
 
-    rt_sem_control(sock->recv_notice, RT_IPC_CMD_RESET, (void*)1);
+    rt_sem_release(sock->recv_notice);
 
     at_do_event_changes(sock, AT_EVENT_RECV, RT_TRUE);
 }
@@ -842,7 +844,7 @@ static void at_closed_notice_cb(struct at_socket *sock, at_socket_evt_t event, c
     at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);
 
     sock->state = AT_SOCKET_CLOSED;
-    rt_sem_control(sock->recv_notice, RT_IPC_CMD_RESET, (void*)1);
+    rt_sem_release(sock->recv_notice);
 }
 
 #ifdef AT_USING_SOCKET_SERVER