diff --git a/src/react/ReactChildren.js b/src/react/ReactChildren.js
index bbc07d81edaad3705a3dca0942e1cbc01bff2624..3ad614637db48974ba8b6d095d192e95baa3210f 100644
--- a/src/react/ReactChildren.js
+++ b/src/react/ReactChildren.js
@@ -1,8 +1,28 @@
-function mapChildren(children, func, context) {
+import {ReactElement} from './ReactElement'
+function mapChildren(children, callback, context) {
     //TODO实现此mapChildren方法
-    return children;
+    var newChildren = [];
+    var indexObj = { index: 0 };//需要是个引用类型，值类型的话，递归函数内修改了，但是外边不知道，仍然以旧值循环
+    traversalAll(children, newChildren, indexObj, callback);
+    return newChildren;
 }
 
+function traversalAll(children, res, indexObj, callback, prefix = '') {
+    if (!children) {
+        return null;
+    }
+    if (Array.isArray(children)) {
+        for (let k = 0; k < children.length; k++) {
+            let spelator = prefix ? ':' : '.'
+            let newPrefixName = prefix + spelator + k;
+            traversalAll(children[k], res, indexObj, callback, newPrefixName);
+        }
+    } else {
+        var oldElement = children;
+        var clonedElement = ReactElement(oldElement.type, prefix, oldElement.ref, oldElement._self, oldElement._source, oldElement._owner, oldElement.props);
+        res.push(callback(clonedElement, indexObj.index++))
+    }
+}
 export {
     mapChildren as map,
 };
\ No newline at end of file
diff --git a/src/react/ReactElement.js b/src/react/ReactElement.js
index 25fdf5ea1b24116f963f57890892d03e3d2e3a78..0d33b6040f66d22e6b51fdd4050e5f73af862f8a 100644
--- a/src/react/ReactElement.js
+++ b/src/react/ReactElement.js
@@ -59,7 +59,7 @@ export function createElement(type, config, children) {
         type, key, ref, self, source, ReactCurrentOwner.current, props
     )
 }
-function ReactElement(type, key, ref, _self, _source, _owner, props) {
+export function ReactElement(type, key, ref, _self, _source, _owner, props) {
     const element = {
         $$typeof: REACT_ELEMENT_TYPE,
         type,