diff --git a/packages/vant/src/date-picker/DatePicker.tsx b/packages/vant/src/date-picker/DatePicker.tsx
index c19c14364..b50b94c49 100644
--- a/packages/vant/src/date-picker/DatePicker.tsx
+++ b/packages/vant/src/date-picker/DatePicker.tsx
@@ -130,7 +130,7 @@ export default defineComponent({
     );
 
     watch(currentValues, (newValues) => {
-      if (isSameValue(newValues, props.modelValue)) {
+      if (!isSameValue(newValues, props.modelValue)) {
         emit('update:modelValue', newValues);
       }
     });