diff --git a/src/react/ReactChildren.js b/src/react/ReactChildren.js
index bbc07d81edaad3705a3dca0942e1cbc01bff2624..98291ed29df19e05eec5908df33aa9ab1339fd27 100644
--- a/src/react/ReactChildren.js
+++ b/src/react/ReactChildren.js
@@ -1,6 +1,34 @@
 function mapChildren(children, func, context) {
     //TODO实现此mapChildren方法
-    return children;
+    if (!children) {
+        return []
+    }
+    let arr = [], idx = 0, key = ''
+    function fn(children) {
+        if (Array.isArray(children)) {
+            for (let i = 0; i < children.length; i++) {
+                let child = children[i];
+                child.key == null ?  key = `.${index}/$` : key = `.$${child.key}/.$`;
+                if (Array.isArray(child)) {
+                    fn(child);
+                } else {
+                    callback(child);
+                    idx++;
+                }
+            }
+        } else {
+            callback([children])
+        }
+    }
+    function callback(children) {
+        let o = func(children, idx);
+        for (let k = 0; k < o.length; k++) {
+            o[k].key = key + o[k].key;
+            arr.push(o[k])
+        }
+    }
+    fn(children);
+    return arr;
 }
 
 export {