diff --git a/src/react/ReactChildren.js b/src/react/ReactChildren.js
index bbc07d81edaad3705a3dca0942e1cbc01bff2624..d8d84476aed95b67f38fd165bb3faa886f570e05 100644
--- a/src/react/ReactChildren.js
+++ b/src/react/ReactChildren.js
@@ -1,8 +1,61 @@
+import { REACT_ELEMENT_TYPE } from '../shared/ReactSymbols'
+
 function mapChildren(children, func, context) {
-    //TODO实现此mapChildren方法
-    return children;
+  const childArray = Array.isArray(children) ? children : [children]
+  const walkedChildren = walk(childArray, func);
+  return walkedChildren;
+}
+
+/**
+ * 
+ * @param {array} arr 子元素
+ * @param {*} func 
+ * @param {*} arrIndex 当前迭代的索引
+ * @param {*} elementIndex 子元素索引
+ */
+function walk(arr, func, arrIndex = 0, elementIndex = 0) {
+  return arr.reduce((collect, item, i) => {
+    // debugger
+    let res;
+    if (Array.isArray(item)) {
+      res = walk(item, func, arrIndex, elementIndex);
+
+    } else {
+      res = func(item, elementIndex)
+      elementIndex++
+    }
+    res = (Array.isArray(res) ? res : [res]).map(resItem => {
+      console.log(item.key);
+
+      if (resItem.$$typeof === REACT_ELEMENT_TYPE) {
+        // 是react元素
+        console.log(i, item.key, resItem.key);
+        let key = '';
+        // 如果当前迭代元素是数组，加上数组索引
+        if (Array.isArray(item)) {
+          key += `.${arrIndex}:`
+        } else if (item.key) {
+          // 如果迭代的元素有key则添加到迭代后的元素上
+          key += `.$${item.key}`
+        } else {
+          key += `.${arrIndex}`
+        }
+        // 如果返回的元素有key追加
+        if (resItem.key) {
+          key += `/.$${resItem.key}`
+        }
+
+        resItem.key = key
+      }
+      return resItem
+    })
+
+    arrIndex++
+
+    return collect.concat(res)
+  }, [])
 }
 
 export {
-    mapChildren as map,
-};
\ No newline at end of file
+  mapChildren as map,
+}; 
\ No newline at end of file