diff --git a/History.md b/History.md
index 1b2e094..3c9dc26 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,7 @@
+1.0.1 / 2017-04-24
+  * [add] ls function can recur list child folder with second para set to be true.
+
+
 1.0.0 / 2017-02-26
 ==================
 
diff --git a/Readme.md b/Readme.md
index 179f8b3..ea22394 100644
--- a/Readme.md
+++ b/Readme.md
@@ -19,10 +19,12 @@
 
 
 
-### ls(path)
+### ls(path, child)
 - path `<String>`
+- child `<Boolean>`
 
 > List all files and folders of the path given exclude '.' and '..'. I t return an array.
+> If para `child` is set to be ture, it will recur list all files of child dir.
 
 
 ### echo(data, file[, append][, encode])
diff --git a/index.js b/index.js
index 0a2aae1..7f3a3c3 100644
--- a/index.js
+++ b/index.js
@@ -32,12 +32,27 @@ class Iofs {
 
     /**
      * [ls 读取整个目录(不遍历子目录)]
-     * @param  {string} file [目标路径]
+     * @param  {string} dir [目标路径]
+     * @param  {boolean} child [是否遍历子目录]
      * @return {array}      [返回目标目录所有文件名和子目录名, 不包括'.'和'..']
      */
-    ls(file){
+    ls(dir, child){
         try{
-            return fs.readdirSync(file)
+            let list = fs.readdirSync(dir)
+
+            if(!child)
+                return list
+
+            let tmp = Array.from(list)
+            tmp.forEach(it => {
+                let childdir = path.join(dir, it)
+                if(this.isdir(childdir)){
+                    list = Array.prototype.concat.apply(list, this.ls(childdir, true).map(sub => {
+                            return path.join(it, sub)
+                    }))
+                }
+            })
+            return list
         }catch(err){
             console.error(err)
             return null
diff --git a/package.json b/package.json
index 5507606..d19d104 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "iofs",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "description": "Base on native fs module, for easy using.",
     "main": "index.js",
     "repository": {