diff --git a/packages/vant/src/time-picker/TimePicker.tsx b/packages/vant/src/time-picker/TimePicker.tsx
index ef49d3a3302..2c58d595937 100644
--- a/packages/vant/src/time-picker/TimePicker.tsx
+++ b/packages/vant/src/time-picker/TimePicker.tsx
@@ -172,9 +172,12 @@ export default defineComponent({
     watch(
       () => props.modelValue,
       (newValues) => {
-        newValues = formatValueRange(newValues, columns.value);
-        if (!isSameValue(newValues, currentValues.value)) {
-          currentValues.value = newValues;
+        const _newValues = formatValueRange(newValues, columns.value);
+        if (
+          !isSameValue(_newValues, currentValues.value) ||
+          !isSameValue(_newValues, newValues)
+        ) {
+          currentValues.value = _newValues;
         }
       },
       { immediate: true },