diff --git a/src/composables/use-link-field.ts b/src/composables/use-link-field.ts
index f95421f22..9a7c2fc81 100644
--- a/src/composables/use-link-field.ts
+++ b/src/composables/use-link-field.ts
@@ -1,11 +1,11 @@
-import { ComponentInstance } from '../utils';
-import { watch, inject } from 'vue';
+import { watch, inject, InjectionKey } from 'vue';
+import type { FieldProvide } from '../field/types';
 
 export const FORM_KEY = Symbol('van-form');
-export const FIELD_KEY = Symbol('van-field');
+export const FIELD_KEY: InjectionKey<FieldProvide> = Symbol('van-field');
 
 export function useLinkField(getValue: () => unknown) {
-  const field = inject(FIELD_KEY, null) as ComponentInstance | null;
+  const field = inject(FIELD_KEY, null);
 
   if (field && !field.childFieldValue.value) {
     field.childFieldValue.value = getValue;
diff --git a/src/field/types.ts b/src/field/types.ts
index 09fdc6ff3..2bf9d2027 100644
--- a/src/field/types.ts
+++ b/src/field/types.ts
@@ -1,3 +1,5 @@
+import type { Ref } from 'vue';
+
 export type FieldType =
   | 'tel'
   | 'text'
@@ -37,6 +39,12 @@ export type FieldRule = {
   formatter?: (value: any, rule: FieldRule) => string;
 };
 
+export type FieldProvide = {
+  childFieldValue: Ref<(() => unknown) | undefined>;
+  resetValidation: () => void;
+  validateWithTrigger: (trigger: FieldValidateTrigger) => void;
+};
+
 declare global {
   interface EventTarget {
     composing?: boolean;