diff --git a/src/dataANDcalc/java/tree/BinaryTreeIterator.java b/src/dataANDcalc/java/tree/BinaryTreeIterator.java
index 6a5f6e3..73992ff 100644
--- a/src/dataANDcalc/java/tree/BinaryTreeIterator.java
+++ b/src/dataANDcalc/java/tree/BinaryTreeIterator.java
@@ -34,6 +34,37 @@ public class BinaryTreeIterator {
         }
     }
 
+    private boolean deleteNode(TreeNode tempNode, int node){
+        boolean deleteFlag = false;
+        if (tempNode == null){
+            return false;
+        }
+        // 需要判断当前节点的左子节点是否为空，因为二叉树是单向的，所以不能直接判断当前节点
+        if(tempNode.left != null){
+            if(tempNode.left.node == node){
+                tempNode.left = null;
+                return true;
+            } else {
+                if(deleteNode(tempNode.left, node)){
+                    return true;
+                }
+            }
+        }
+
+        // 需要判断当前节点的右子节点是否为空，因为二叉树是单向的，所以不能直接判断当前节点
+        if(tempNode.right != null){
+            if(tempNode.right.node == node){
+                tempNode.right = null;
+                return true;
+            } else {
+                if(deleteNode(tempNode.right, node)){
+                    return true;
+                }
+            }
+        }
+        return deleteFlag;
+    }
+
     private void forwardIterator(TreeNode treeNode){
         if(treeNode == null){
             System.out.println("当前节点为空");
@@ -110,6 +141,13 @@ public class BinaryTreeIterator {
         int[] arr = {7, 3, 10, 12, 5, 1, 9};
         BinaryTreeIterator treeIterator = new BinaryTreeIterator();
         treeIterator.transTree(arr);
+         /**
+              7
+          3      10
+        1   5  9    12
+        **/
+        boolean delFlag = treeIterator.deleteNode(treeIterator.root, 9);
+        System.out.println("删除结果："+delFlag);
         System.out.println("前序遍历:");
         treeIterator.forwardIterator(treeIterator.root);
         System.out.println("中序遍历:");