diff --git a/README.md b/README.md
index 08476d7c72335aeb12d392e21828a629e12bb782..82e9e5ad81b142c8589ae5c5e81685ba65d43cf5 100644
--- a/README.md
+++ b/README.md
@@ -164,7 +164,7 @@ RT-Thread Studio ：可以在 Studio 中下载源码包并创建 rt-thread 工
 
 [netdev 网卡](/rt-thread-version/rt-thread-standard/programming-manual/netdev/netdev)
 
-[SAL 套接字抽象层](/rt-thread-version/rt-thread-standard/programming-manual/sal/sal)
+[SAL 套接字抽象层](/rt-thread-version/rt-thread-standard/programming-manual/sal/sal.md)
 
 [AT 命令](/rt-thread-version/rt-thread-standard/programming-manual/at/at)