diff --git a/problems/0700.二叉搜索树中的搜索.md b/problems/0700.二叉搜索树中的搜索.md
index a0143bd8..c09f11b9 100644
--- a/problems/0700.二叉搜索树中的搜索.md
+++ b/problems/0700.二叉搜索树中的搜索.md
@@ -441,6 +441,29 @@ impl Solution {
 }
 ```
 
+迭代：
+
+```rust
+use std::cell::RefCell;
+use std::rc::Rc;
+use std::cmp;
+impl Solution {
+    pub fn search_bst(
+        mut root: Option<Rc<RefCell<TreeNode>>>,
+        val: i32,
+    ) -> Option<Rc<RefCell<TreeNode>>> {
+        while let Some(ref node) = root.clone() {
+            match val.cmp(&node.borrow().val) {
+                cmp::Ordering::Less => root = node.borrow().left.clone(),
+                cmp::Ordering::Equal => return root,
+                cmp::Ordering::Greater => root = node.borrow().right.clone(),
+            };
+        }
+        None
+    }
+}
+```
+
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