diff --git a/src/components/table/table.vue b/src/components/table/table.vue
index 2afbb43fe..842a8d82b 100644
--- a/src/components/table/table.vue
+++ b/src/components/table/table.vue
@@ -1378,7 +1378,7 @@
             makeColumnsId (columns) {
                 const cloneColumns = deepCopy(columns);
                 return cloneColumns.map(item => {
-                    if ('children' in item) this.makeColumnsId(item.children);
+                    if ('children' in item) item.children = this.makeColumnsId(item.children);
                     item.__id = getRandomStr(6);
                     return item;
                 });