diff --git a/docs/chapter_array_and_linkedlist/linked_list.md b/docs/chapter_array_and_linkedlist/linked_list.md
index de9251347..ac887baba 100755
--- a/docs/chapter_array_and_linkedlist/linked_list.md
+++ b/docs/chapter_array_and_linkedlist/linked_list.md
@@ -91,7 +91,11 @@
 === "C"
 
     ```c title=""
-
+    /* 链表结点结构体 */
+    struct ListNode {
+        int val;         // 结点值
+        ListNode *next;  // 指向下一结点的指针（引用）
+    };
     ```
 
 === "C#"