diff --git a/components/net/sal_socket/src/sal_socket.c b/components/net/sal_socket/src/sal_socket.c
index 44442d306f..37bc2eb440 100644
--- a/components/net/sal_socket/src/sal_socket.c
+++ b/components/net/sal_socket/src/sal_socket.c
@@ -94,12 +94,12 @@ do {
  * SAL (Socket Abstraction Layer) initialize.
  *
  * @return result  0: initialize success
- *                -1: initialize failed        
+ *                -1: initialize failed
  */
 int sal_init(void)
 {
     int cn;
-    
+
     if (init_ok)
     {
         LOG_D("Socket Abstraction Layer is already initialized.");
@@ -115,7 +115,7 @@ int sal_init(void)
         LOG_E("No memory for socket table.\n");
         return -1;
     }
-    
+
     /* create sal socket lock */
     rt_mutex_init(&sal_core_lock, "sal_lock", RT_IPC_FLAG_FIFO);
 
@@ -148,7 +148,7 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
     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"};
+    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];
     int moth_num = 0;
 
@@ -175,7 +175,7 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
     }
 
     skt_ops = pf->skt_ops;
-    if((sockfd = skt_ops->socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+    if ((sockfd = skt_ops->socket(AF_INET, SOCK_DGRAM, 0)) < 0)
     {
         result = -RT_ERROR;
         goto __exit;
@@ -224,7 +224,7 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
     send_data[11] = RT_REVISION;
 
     skt_ops->sendto(sockfd, send_data, SAL_INTERNET_BUFF_LEN, 0,
-            (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
+                    (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
 
     result = skt_ops->recvfrom(sockfd, &recv_data, sizeof(recv_data), 0, (struct sockaddr *)&server_addr, &addr_len);
     if (result < 0)
@@ -242,7 +242,7 @@ __exit:
     if (result > 0)
     {
         LOG_D("Set network interface device(%s) internet status up.", netdev->name);
-        netdev->flags |= NETDEV_FLAG_INTERNET_UP;       
+        netdev->flags |= NETDEV_FLAG_INTERNET_UP;
     }
     else
     {
@@ -277,7 +277,7 @@ int sal_check_netdev_internet_up(struct netdev *netdev)
 
     rt_delayed_work_init(net_work, check_netdev_internet_up_work, (void *)netdev);
     rt_work_submit(&(net_work->work), RT_TICK_PER_SECOND);
-    
+
     return 0;
 }
 
@@ -316,10 +316,7 @@ struct sal_socket *sal_get_socket(int socket)
 
     socket = socket - SAL_SOCKET_OFFSET;
     /* check socket structure valid or not */
-    if (st->sockets[socket]->magic != SAL_SOCKET_MAGIC)
-    {
-        return RT_NULL;
-    }
+    RT_ASSERT(st->sockets[socket]->magic == SAL_SOCKET_MAGIC);
 
     return st->sockets[socket];
 }
@@ -376,7 +373,8 @@ int sal_netdev_cleanup(struct netdev *netdev)
         {
             rt_thread_mdelay(rt_tick_from_millisecond(100));
         }
-    } while (find_dev);
+    }
+    while (find_dev);
 
     return 0;
 }
@@ -428,7 +426,7 @@ static int socket_init(int family, int type, int protocol, struct sal_socket **r
             flag = RT_TRUE;
         }
     }
-    
+
     if (flag == RT_FALSE)
     {
         /* get network interface device by protocol family */
@@ -452,8 +450,7 @@ static int socket_alloc(struct sal_socket_table *st, int f_socket)
     /* find an empty socket entry */
     for (idx = f_socket; idx < (int) st->max_socket; idx++)
     {
-        if (st->sockets[idx] == RT_NULL || 
-                st->sockets[idx]->netdev == RT_NULL)
+        if (st->sockets[idx] == RT_NULL)
         {
             break;
         }
@@ -497,6 +494,15 @@ __result:
     return idx;
 }
 
+static void socket_free(struct sal_socket_table *st, int idx)
+{
+    struct sal_socket *sock;
+
+    sock = st->sockets[idx];
+    st->sockets[idx] = RT_NULL;
+    rt_free(sock);
+}
+
 static int socket_new(void)
 {
     struct sal_socket *sock;
@@ -529,18 +535,38 @@ __result:
     return idx + SAL_SOCKET_OFFSET;
 }
 
+static void socket_delete(int socket)
+{
+    struct sal_socket *sock;
+    struct sal_socket_table *st = &socket_table;
+    int idx;
+
+    idx = socket - SAL_SOCKET_OFFSET;
+    if (idx < 0 || idx >= (int) st->max_socket)
+    {
+        return;
+    }
+    sal_lock();
+    sock = sal_get_socket(socket);
+    RT_ASSERT(sock != RT_NULL);
+    sock->magic = 0;
+    sock->netdev = RT_NULL;
+    socket_free(st, idx);
+    sal_unlock();
+}
+
 int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
 {
     int new_socket;
     struct sal_socket *sock;
-    struct sal_proto_family *pf; 
+    struct sal_proto_family *pf;
 
     /* get the socket object by socket descriptor */
     SAL_SOCKET_OBJ_GET(sock, socket);
 
     /* check the network interface socket operations */
     SAL_NETDEV_SOCKETOPS_VALID(sock->netdev, pf, accept);
-  
+
     new_socket = pf->skt_ops->accept((int) sock->user_data, addr, addrlen);
     if (new_socket != -1)
     {
@@ -550,18 +576,20 @@ int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
 
         /* allocate a new socket structure and registered socket options */
         new_sal_socket = socket_new();
-        if (new_sal_socket < 0)
+        new_sock = sal_get_socket(new_sal_socket);
+        if (new_sock == RT_NULL)
         {
             pf->skt_ops->closesocket(new_socket);
             return -1;
         }
-        new_sock = sal_get_socket(new_sal_socket);
 
         retval = socket_init(sock->domain, sock->type, sock->protocol, &new_sock);
         if (retval < 0)
         {
             pf->skt_ops->closesocket(new_socket);
             rt_memset(new_sock, 0x00, sizeof(struct sal_socket));
+            /* socket init failed, delete socket */
+            socket_delete(new_sal_socket);
             LOG_E("New socket registered failed, return error %d.", retval);
             return -1;
         }
@@ -587,7 +615,7 @@ static void sal_sockaddr_to_ipaddr(const struct sockaddr *name, ip_addr_t *local
 #elif NETDEV_IPV6
 #error "not only support IPV6"
 #endif /* NETDEV_IPV4 && NETDEV_IPV6*/
-}   
+}
 
 int sal_bind(int socket, const struct sockaddr *name, socklen_t namelen)
 {
@@ -636,7 +664,7 @@ int sal_bind(int socket, const struct sockaddr *name, socklen_t namelen)
             sock->user_data = (void *) new_socket;
         }
     }
-    
+
     /* check and get protocol families by the network interface device */
     SAL_NETDEV_SOCKETOPS_VALID(sock->netdev, pf, bind);
     return pf->skt_ops->bind((int) sock->user_data, name, namelen);
@@ -673,9 +701,8 @@ int sal_shutdown(int socket, int how)
         error = -1;
     }
 
-    /* free socket */
-    rt_free(sock);
-    socket_table.sockets[socket] = RT_NULL;
+    /* delete socket */
+    socket_delete(socket);
 
     return error;
 }
@@ -791,7 +818,7 @@ int sal_connect(int socket, const struct sockaddr *name, socklen_t namelen)
         {
             return -1;
         }
-        
+
         return ret;
     }
 #endif
@@ -814,7 +841,7 @@ int sal_listen(int socket, int backlog)
 }
 
 int sal_recvfrom(int socket, void *mem, size_t len, int flags,
-             struct sockaddr *from, socklen_t *fromlen)
+                 struct sockaddr *from, socklen_t *fromlen)
 {
     struct sal_socket *sock;
     struct sal_proto_family *pf;
@@ -831,11 +858,11 @@ int sal_recvfrom(int socket, void *mem, size_t len, int flags,
     if (SAL_SOCKOPS_PROTO_TLS_VALID(sock, recv))
     {
         int ret;
-        
+
         if ((ret = proto_tls->ops->recv(sock->user_data_tls, mem, len)) < 0)
         {
             return -1;
-        }   
+        }
         return ret;
     }
     else
@@ -848,7 +875,7 @@ int sal_recvfrom(int socket, void *mem, size_t len, int flags,
 }
 
 int sal_sendto(int socket, const void *dataptr, size_t size, int flags,
-           const struct sockaddr *to, socklen_t tolen)
+               const struct sockaddr *to, socklen_t tolen)
 {
     struct sal_socket *sock;
     struct sal_proto_family *pf;
@@ -865,11 +892,11 @@ int sal_sendto(int socket, const void *dataptr, size_t size, int flags,
     if (SAL_SOCKOPS_PROTO_TLS_VALID(sock, send))
     {
         int ret;
-        
+
         if ((ret = proto_tls->ops->send(sock->user_data_tls, dataptr, size)) < 0)
         {
             return -1;
-        }      
+        }
         return ret;
     }
     else
@@ -907,6 +934,7 @@ int sal_socket(int domain, int type, int protocol)
     if (retval < 0)
     {
         LOG_E("SAL socket protocol family input failed, return error %d.", retval);
+        socket_delete(socket);
         return -1;
     }
 
@@ -922,6 +950,7 @@ int sal_socket(int domain, int type, int protocol)
             sock->user_data_tls = proto_tls->ops->socket(socket);
             if (sock->user_data_tls == RT_NULL)
             {
+                socket_delete(socket);
                 return -1;
             }
         }
@@ -964,9 +993,8 @@ int sal_closesocket(int socket)
         error = -1;
     }
 
-    /* free socket */
-    rt_free(sock);        
-    socket_table.sockets[socket] = RT_NULL;
+    /* delete socket */
+    socket_delete(socket);
 
     return error;
 }
@@ -1027,7 +1055,7 @@ struct hostent *sal_gethostbyname(const char *name)
 }
 
 int sal_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
-                size_t buflen, struct hostent **result, int *h_errnop)
+                        size_t buflen, struct hostent **result, int *h_errnop)
 {
     struct netdev *netdev = netdev_default;
     struct sal_proto_family *pf;
@@ -1050,9 +1078,9 @@ int sal_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
 }
 
 int sal_getaddrinfo(const char *nodename,
-       const char *servname,
-       const struct addrinfo *hints,
-       struct addrinfo **res)
+                    const char *servname,
+                    const struct addrinfo *hints,
+                    struct addrinfo **res)
 {
     struct netdev *netdev = netdev_default;
     struct sal_proto_family *pf;