diff --git a/docs/arceos-modules/fs/api.md b/docs/arceos-modules/fs/api.md
index 76293d5..13ea7a9 100644
--- a/docs/arceos-modules/fs/api.md
+++ b/docs/arceos-modules/fs/api.md
@@ -1 +1,3 @@
-# ArceOS 文件系统接口
\ No newline at end of file
+# ArceOS 文件系统接口
+
+见 https://arceos.org/arceos/axfs/index.html
\ No newline at end of file
diff --git a/docs/arceos-modules/fs/vfs.md b/docs/arceos-modules/fs/vfs.md
index 7c75e58..0ea03f2 100644
--- a/docs/arceos-modules/fs/vfs.md
+++ b/docs/arceos-modules/fs/vfs.md
@@ -2,4 +2,26 @@
 
 ## 文件系统兼容层
 
-## 接入不同文件系统
\ No newline at end of file
+`axfs_vfs` 是 `ArceOS` 使用的虚拟文件操作系统接口。
+
+上层的文件系统需要实现 `trait VfsOps`，其文件和目录需要实现 `trait VfsNodeOps`。
+
+详见 https://docs.rs/axfs_vfs/latest/axfs_vfs/
+
+## 接入不同文件系统
+
+### axfs_ramfs
+
+https://docs.rs/axfs_ramfs/latest/axfs_ramfs/
+
+### axfs_devfs
+
+https://docs.rs/axfs_devfs/latest/axfs_devfs/
+
+### fatfs
+
+基于 https://github.com/rafalh/rust-fatfs 实现
+
+### lwext4_rust
+
+基于 https://github.com/Azure-stars/lwext4_rust 实现
\ No newline at end of file