diff --git a/libs/horizon/src/renderer/diff/nodeDiffComparator.ts b/libs/horizon/src/renderer/diff/nodeDiffComparator.ts
index 183e6dd9..84462e0e 100644
--- a/libs/horizon/src/renderer/diff/nodeDiffComparator.ts
+++ b/libs/horizon/src/renderer/diff/nodeDiffComparator.ts
@@ -70,7 +70,8 @@ function checkCanReuseNode(oldNode: VNode | null, newChild: any, newNodeIdx: num
       return oldKey === null;
     }
     if (newChild.vtype === TYPE_COMMON_ELEMENT || newChild.vtype === TYPE_PORTAL) {
-      if(oldKey || newChild.key) {
+      // key存在时用key判断复用
+      if (oldKey != null || newChild.key != null) {
         return oldKey === newChild.key;
       } else {
         // 新旧节点的index应该相同才能复用，null会影响位置