diff --git a/problems/0707.设计链表.md b/problems/0707.设计链表.md
index 145efa18..95e90ac6 100644
--- a/problems/0707.设计链表.md
+++ b/problems/0707.设计链表.md
@@ -706,6 +706,9 @@ func (this *MyLinkedList) AddAtIndex(index int, val int) {
 		head = head.Next
 		index--
 	}
+	if index > 0 {
+		return
+	}
 	node := &Node{
 		Val: val,
 		//node.Next = MyLinkedList[index]