diff --git a/src/components/table/table.vue b/src/components/table/table.vue
index 8885b2c..5be06da 100644
--- a/src/components/table/table.vue
+++ b/src/components/table/table.vue
@@ -833,7 +833,7 @@
             // 修改列，设置一个隐藏的 id，便于后面的多级表头寻找对应的列，否则找不到
             makeColumnsId (columns) {
                 return columns.map(item => {
-                    if ('children' in item) item.children = this.makeColumnsId(item.children);
+                    if ('children' in item) this.makeColumnsId(item.children);
                     item.__id = getRandomStr(6);
                     return item;
                 });
--
libgit2 0.21.4