diff --git a/packages/vant/src/area/Area.tsx b/packages/vant/src/area/Area.tsx
index b059be877..629da5c72 100644
--- a/packages/vant/src/area/Area.tsx
+++ b/packages/vant/src/area/Area.tsx
@@ -188,15 +188,15 @@ export default defineComponent({
     };
 
     const setValues = () => {
-      let code = state.code || getDefaultCode();
       const picker = pickerRef.value;
-      const province = getColumnValues('province');
-      const city = getColumnValues('city', code.slice(0, 2));
 
       if (!picker) {
         return;
       }
 
+      let code = state.code || getDefaultCode();
+      const province = getColumnValues('province');
+      const city = getColumnValues('city', code.slice(0, 2));
       picker.setColumnValues(0, province);
       picker.setColumnValues(1, city);
 
diff --git a/packages/vant/src/picker/PickerColumn.tsx b/packages/vant/src/picker/PickerColumn.tsx
index 083dc4479..2768c8dd7 100644
--- a/packages/vant/src/picker/PickerColumn.tsx
+++ b/packages/vant/src/picker/PickerColumn.tsx
@@ -1,4 +1,4 @@
-import { ref, watch, reactive, defineComponent } from 'vue';
+import { ref, watch, reactive, defineComponent, type InjectionKey } from 'vue';
 
 // Utils
 import { deepClone } from '../utils/deep-clone';
@@ -20,7 +20,7 @@ import { useTouch } from '../composables/use-touch';
 import { useExpose } from '../composables/use-expose';
 
 // Types
-import type { PickerOption } from './types';
+import type { PickerOption, PickerColumnProvide } from './types';
 
 const DEFAULT_DURATION = 200;
 
@@ -38,7 +38,7 @@ function getElementTranslateY(element: Element) {
   return Number(translateY);
 }
 
-export const PICKER_KEY = Symbol(name);
+export const PICKER_KEY: InjectionKey<PickerColumnProvide> = Symbol(name);
 
 const isOptionDisabled = (option: PickerOption) =>
   isObject(option) && option.disabled;
diff --git a/packages/vant/src/picker/types.ts b/packages/vant/src/picker/types.ts
index 295c87895..342525dca 100644
--- a/packages/vant/src/picker/types.ts
+++ b/packages/vant/src/picker/types.ts
@@ -44,4 +44,18 @@ export type PickerExpose = {
   setColumnValues: (index: number, options: PickerOption[]) => void;
 };
 
+export type PickerColumnProvide = {
+  state: {
+    index: number;
+    offset: number;
+    duration: number;
+    options: PickerOption[];
+  };
+  setIndex: (index: number, emitChange?: boolean | undefined) => void;
+  getValue: () => PickerOption;
+  setValue: (value: string) => void;
+  setOptions: (options: PickerOption[]) => void;
+  stopMomentum: () => void;
+};
+
 export type PickerInstance = ComponentPublicInstance<PickerProps, PickerExpose>;