diff --git a/problems/0104.二叉树的最大深度.md b/problems/0104.二叉树的最大深度.md
index 2bcc9c5c..b74529d6 100644
--- a/problems/0104.二叉树的最大深度.md
+++ b/problems/0104.二叉树的最大深度.md
@@ -552,6 +552,29 @@ func maxdepth(root *treenode) int {
 
 ```
 
+### 559. n叉树的最大深度
+
+```go
+func maxDepth(root *Node) int {
+    if root == nil {
+        return 0
+    }
+    q := list.New()
+    q.PushBack(root)
+    depth := 0
+    for q.Len() > 0 {
+        n := q.Len()
+        for i := 0; i < n; i++ {
+            node := q.Remove(q.Front()).(*Node)
+            for j := range node.Children {
+                q.PushBack(node.Children[j])
+            }
+        }
+        depth++
+    }
+    return depth 
+}
+```
 
 ## javascript