diff --git a/src/components/selection/TreeDataSelectModal.vue b/src/components/selection/TreeDataSelectModal.vue
index 01b289e6..821e80ee 100644
--- a/src/components/selection/TreeDataSelectModal.vue
+++ b/src/components/selection/TreeDataSelectModal.vue
@@ -223,7 +223,7 @@ export default {
               // 有子节点获取子节点数据
               childrenList = info.node.dataRef[this.replaceFields.children].map(item => item[this.replaceFields.key])
             }
-            this.checkedKeys = [...this.checkedKeys, ...checkedKeys.checked, ...childrenList]
+            this.checkedKeys = [...new Set([...this.checkedKeys, ...checkedKeys.checked, ...childrenList])]
           } else {
             // 是取消选中了，把当前和子节点都取消选中
             let currAndChildNode = []