diff --git a/packages/vant-use/src/useRelation/README.md b/packages/vant-use/src/useRelation/README.md
index b6a674935..dfc0f3aca 100644
--- a/packages/vant-use/src/useRelation/README.md
+++ b/packages/vant-use/src/useRelation/README.md
@@ -48,14 +48,14 @@ export default {
 
 ```ts
 function useParent<T>(
-  key: string
+  key: string | symbol
 ): {
   parent?: T;
   index?: Ref<number>;
 };
 
 function useChildren(
-  key: string
+  key: string | symbol
 ): {
   children: ComponentPublicInstance[];
   linkChildren: (value: any) => void;
diff --git a/packages/vant-use/src/useRelation/index.ts b/packages/vant-use/src/useRelation/index.ts
index 01e70d635..6ca02f4da 100644
--- a/packages/vant-use/src/useRelation/index.ts
+++ b/packages/vant-use/src/useRelation/index.ts
@@ -59,7 +59,7 @@ export function sortChildren(
   });
 }
 
-export function useChildren(key: string) {
+export function useChildren(key: string | symbol) {
   const publicChildren: PublicInstance[] = reactive([]);
   const internalChildren: InternalInstance[] = reactive([]);
   const parent = getCurrentInstance()!;
@@ -101,7 +101,7 @@ type ParentProvide<T> = T & {
   internalChildren: InternalInstance[];
 };
 
-export function useParent<T>(key: string) {
+export function useParent<T>(key: string | symbol) {
   const parent = inject<ParentProvide<T> | null>(key, null);
 
   if (parent) {