diff --git a/packages/amis-editor-core/scss/editor.scss b/packages/amis-editor-core/scss/editor.scss
index e58b5fef5..58dd46f12 100644
--- a/packages/amis-editor-core/scss/editor.scss
+++ b/packages/amis-editor-core/scss/editor.scss
@@ -588,7 +588,8 @@
         height: 20px;
         line-height: 20px;
         border-radius: 20px;
-        top: 20%;
+        top: 50%;
+        transform: translate(0, -50%);
 
         > span > svg {
           width: 12px;
diff --git a/packages/amis-editor-core/src/manager.ts b/packages/amis-editor-core/src/manager.ts
index 0c2103f7d..ff212b115 100644
--- a/packages/amis-editor-core/src/manager.ts
+++ b/packages/amis-editor-core/src/manager.ts
@@ -869,6 +869,9 @@ export class EditorManager {
       if (!regionNode.region && regionNode.schema.body) {
         // 默认插入到父节点的body中
         regionNodeRegion = 'body';
+      } else if (!regionNode.region && regionNode.schema?.type === 'flex' && regionNode.schema.items) {
+        // flex布局容器
+        regionNodeRegion = 'items';
       } else if (!regionNode.region && !regionNode.schema.body) {
         // 其他特殊情况暂时不考虑，给予提示
         toast.warning('当前节点不允许追加新组件。');
diff --git a/packages/amis-editor-core/src/store/editor.ts b/packages/amis-editor-core/src/store/editor.ts
index bc69ce415..b428e2931 100644
--- a/packages/amis-editor-core/src/store/editor.ts
+++ b/packages/amis-editor-core/src/store/editor.ts
@@ -852,6 +852,7 @@ export const EditorStore = types
         return idx < self.schemaHistory.length - 1;
       },
 
+      // 判断是否时布局容器中的列级元素
       isFlexItem(id: string) {
         const activeId = id || self.activeId;
         const parentSchema = this.getSchemaParentById(activeId, true);