diff --git a/problems/二叉树理论基础.md b/problems/二叉树理论基础.md
index 9c151e32..9e10ac20 100644
--- a/problems/二叉树理论基础.md
+++ b/problems/二叉树理论基础.md
@@ -258,6 +258,13 @@ class TreeNode<T> {
     }
 }
 ```
-
+Scala:
+```scala
+class TreeNode(_value: Int = 0, _left: TreeNode = null, _right: TreeNode = null) {
+  var value: Int = _value
+  var left: TreeNode = _left
+  var right: TreeNode = _right
+}
+```
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 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>