diff --git a/hutool-core/src/main/java/cn/hutool/core/tree/TreeUtil.java b/hutool-core/src/main/java/cn/hutool/core/tree/TreeUtil.java
index 5e1f5ce32..06853e18e 100644
--- a/hutool-core/src/main/java/cn/hutool/core/tree/TreeUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/tree/TreeUtil.java
@@ -314,6 +314,7 @@ public class TreeUtil {
 		queue.offer(root);
 		while (!queue.isEmpty()) {
 			Tree<E> node = queue.poll();
+            list.add(node);
 			if (node.hasChild()) {
 				node.getChildren().forEach(queue::offer);
 			}