diff --git a/packages/calendar/README.md b/packages/calendar/README.md
index 05349ae5..de21ae24 100644
--- a/packages/calendar/README.md
+++ b/packages/calendar/README.md
@@ -274,7 +274,7 @@ Page({
 | color | 主题色，对底部按钮和选中日期生效 | _string_ | `#ee0a24` |
 | min-date | 可选择的最小日期 | _timestamp_ | 当前日期 |
 | max-date | 可选择的最大日期 | _timestamp_ | 当前日期的六个月后 |
-| default-date | 默认选中的日期，`type`为`multiple`或`range`时为数组 | _timestamp \| timestamp[]_ | 今天 |
+| default-date `v1.10.21` | 默认选中的日期，`type`为`multiple`或`range`时为数组，传入 `null` 表示默认不选择| _timestamp \| timestamp[] \| null_ | 今天 |
 | row-height | 日期行高 | _number \| string_ | `64` |
 | formatter | 日期格式化函数 | _(day: Day) => Day_ | - |
 | poppable | 是否以弹层的形式展示日历 | _boolean_ | `true` |
diff --git a/packages/calendar/index.ts b/packages/calendar/index.ts
index ab3e16de..4c897360 100644
--- a/packages/calendar/index.ts
+++ b/packages/calendar/index.ts
@@ -63,6 +63,7 @@ VantComponent({
     },
     defaultDate: {
       type: null,
+      value: getToday().getTime(),
       observer(val) {
         this.setData({ currentDate: val });
         this.scrollIntoView();
@@ -202,6 +203,8 @@ VantComponent({
     getInitialDate(defaultDate: number | number[] | null = null) {
       const { type, minDate, maxDate, allowSameDay } = this.data;
 
+      if (!defaultDate) return [];
+
       const now = getToday().getTime();
 
       if (type === 'range') {
@@ -245,6 +248,7 @@ VantComponent({
       requestAnimationFrame(() => {
         const { currentDate, type, show, poppable, minDate, maxDate } =
           this.data;
+        if (!currentDate) return;
         // @ts-ignore
         const targetDate = type === 'single' ? currentDate : currentDate[0];
         const displayed = show || !poppable;