diff --git a/components/net/netdev/include/netdev.h b/components/net/netdev/include/netdev.h
index 5dc68bf216..cafa73d4c2 100644
--- a/components/net/netdev/include/netdev.h
+++ b/components/net/netdev/include/netdev.h
@@ -111,8 +111,6 @@ struct netdev
 extern struct netdev *netdev_list;
 /* The default network interface device */
 extern struct netdev *netdev_default;
-/* The local virtual network device */
-extern struct netdev *netdev_lo;
 /* The network interface device ping response object */
 struct netdev_ping_resp
 {
diff --git a/components/net/netdev/src/netdev.c b/components/net/netdev/src/netdev.c
index 8d21db756c..2f4cea5120 100644
--- a/components/net/netdev/src/netdev.c
+++ b/components/net/netdev/src/netdev.c
@@ -35,8 +35,6 @@
 struct netdev *netdev_list = RT_NULL;
 /* The default network interface device */
 struct netdev *netdev_default = RT_NULL;
-/* The local virtual network device */
-struct netdev *netdev_lo = RT_NULL;
 /* The global network register callback */
 static netdev_callback_fn g_netdev_register_callback = RT_NULL;
 static netdev_callback_fn g_netdev_default_change_callback = RT_NULL;
diff --git a/components/net/sal/src/sal_socket.c b/components/net/sal/src/sal_socket.c
index 1317c5c1bd..aebf8d5ff1 100644
--- a/components/net/sal/src/sal_socket.c
+++ b/components/net/sal/src/sal_socket.c
@@ -444,11 +444,6 @@ static int socket_init(int family, int type, int protocol, struct sal_socket **r
     struct netdev *netdev = RT_NULL;
     rt_bool_t flag = RT_FALSE;
 
-    if (family == AF_UNIX)
-    {
-        netdv_def = netdev_lo;
-    }
-
     if (family < 0 || family > AF_MAX)
     {
         return -1;