diff --git a/package.json b/package.json
index 9f8816b25..c5971dec9 100644
--- a/package.json
+++ b/package.json
@@ -65,6 +65,7 @@
   "devDependencies": {
     "@ls-lint/ls-lint": "^1.8.0",
     "@vant/cli": "^2.4.0",
+    "prettier": "^2.0.2",
     "vue": "^2.6.11",
     "vue-template-compiler": "^2.6.11"
   },
diff --git a/src/calendar/index.js b/src/calendar/index.js
index 76c4147a4..4d2b4fd2f 100644
--- a/src/calendar/index.js
+++ b/src/calendar/index.js
@@ -7,10 +7,11 @@ import {
   copyDates,
   getNextDay,
   compareDay,
+  ROW_HEIGHT,
+  calcDateNum,
   compareMonth,
   createComponent,
-  calcDateNum,
-  ROW_HEIGHT,
+  getDayByOffset,
 } from './utils';
 
 // Components
@@ -294,26 +295,36 @@ export default createComponent({
     },
 
     select(date, complete) {
-      this.currentDate = date;
-      this.$emit('select', copyDates(this.currentDate));
+      const emit = (date) => {
+        this.currentDate = date;
+        this.$emit('select', copyDates(this.currentDate));
+      };
 
       if (complete && this.type === 'range') {
-        const valid = this.checkRange();
+        const valid = this.checkRange(date);
 
         if (!valid) {
+          // auto selected to max range if showConfirm
+          if (this.showConfirm) {
+            emit([date[0], getDayByOffset(date[0], this.maxRange - 1)]);
+          } else {
+            emit(date);
+          }
           return;
         }
       }
 
+      emit(date);
+
       if (complete && !this.showConfirm) {
         this.onConfirm();
       }
     },
 
-    checkRange() {
-      const { maxRange, currentDate, rangePrompt } = this;
+    checkRange(date) {
+      const { maxRange, rangePrompt } = this;
 
-      if (maxRange && calcDateNum(currentDate) > maxRange) {
+      if (maxRange && calcDateNum(date) > maxRange) {
         Toast(rangePrompt || t('rangePrompt', maxRange));
         return false;
       }
@@ -322,10 +333,6 @@ export default createComponent({
     },
 
     onConfirm() {
-      if (this.type === 'range' && !this.checkRange()) {
-        return;
-      }
-
       this.$emit('confirm', copyDates(this.currentDate));
     },
 
diff --git a/src/calendar/test/index.spec.js b/src/calendar/test/index.spec.js
index ca4ba49ee..9a3f70dfe 100644
--- a/src/calendar/test/index.spec.js
+++ b/src/calendar/test/index.spec.js
@@ -1,26 +1,14 @@
 import Calendar from '..';
 import { mount, later } from '../../../test';
 import { getNextDay } from '../utils';
-
-const now = new Date();
-const minDate = new Date(2010, 0, 10);
-const maxDate = new Date(2010, 0, 20);
-
-function formatDate(date) {
-  if (date) {
-    return `${date.getFullYear()}/${date.getMonth() + 1}/${date.getDate()}`;
-  }
-
-  return '';
-}
-
-function formatRange([start, end]) {
-  return `${formatDate(start)}-${formatDate(end)}`;
-}
-
-function formatMultiple(dates) {
-  return dates.map(formatDate).join(',');
-}
+import {
+  now,
+  minDate,
+  maxDate,
+  formatDate,
+  formatRange,
+  formatMultiple,
+} from './utils';
 
 test('select event when type is single', async () => {
   const wrapper = mount(Calendar, {
diff --git a/src/calendar/test/prop.spec.js b/src/calendar/test/prop.spec.js
index 8bbf7d801..02bedf27c 100644
--- a/src/calendar/test/prop.spec.js
+++ b/src/calendar/test/prop.spec.js
@@ -1,16 +1,39 @@
 import Calendar from '..';
 import { mount, later } from '../../../test';
+import { minDate, maxDate, formatRange } from './utils';
 
-const minDate = new Date(2010, 0, 10);
-const maxDate = new Date(2010, 0, 20);
-
-test('max-range prop', async () => {
+test('max-range prop when showConfirm is false', async () => {
   const wrapper = mount(Calendar, {
     propsData: {
       type: 'range',
       minDate,
       maxDate,
-      maxRange: 1,
+      maxRange: 3,
+      poppable: false,
+      showConfirm: false,
+    },
+  });
+
+  await later();
+
+  const days = wrapper.findAll('.van-calendar__day');
+  days.at(12).trigger('click');
+  days.at(18).trigger('click');
+
+  expect(formatRange(wrapper.emitted('select')[0][0])).toEqual('2010/1/13-');
+  expect(formatRange(wrapper.emitted('select')[1][0])).toEqual(
+    '2010/1/13-2010/1/19'
+  );
+  expect(wrapper.emitted('confirm')).toBeFalsy();
+});
+
+test('max-range prop when showConfirm is true', async () => {
+  const wrapper = mount(Calendar, {
+    propsData: {
+      type: 'range',
+      minDate,
+      maxDate,
+      maxRange: 3,
       poppable: false,
     },
   });
@@ -18,10 +41,13 @@ test('max-range prop', async () => {
   await later();
 
   const days = wrapper.findAll('.van-calendar__day');
-  days.at(15).trigger('click');
+  days.at(12).trigger('click');
   days.at(18).trigger('click');
-  wrapper.find('.van-calendar__confirm').trigger('click');
 
+  expect(formatRange(wrapper.emitted('select')[0][0])).toEqual('2010/1/13-');
+  expect(formatRange(wrapper.emitted('select')[1][0])).toEqual(
+    '2010/1/13-2010/1/15'
+  );
   expect(wrapper.emitted('confirm')).toBeFalsy();
 });
 
diff --git a/src/calendar/test/utils.js b/src/calendar/test/utils.js
new file mode 100644
index 000000000..2034d3af9
--- /dev/null
+++ b/src/calendar/test/utils.js
@@ -0,0 +1,19 @@
+export const now = new Date();
+export const minDate = new Date(2010, 0, 10);
+export const maxDate = new Date(2010, 0, 20);
+
+export function formatDate(date) {
+  if (date) {
+    return `${date.getFullYear()}/${date.getMonth() + 1}/${date.getDate()}`;
+  }
+
+  return '';
+}
+
+export function formatRange([start, end]) {
+  return `${formatDate(start)}-${formatDate(end)}`;
+}
+
+export function formatMultiple(dates) {
+  return dates.map(formatDate).join(',');
+}
diff --git a/src/calendar/utils.ts b/src/calendar/utils.ts
index 57d69bd56..273b096f4 100644
--- a/src/calendar/utils.ts
+++ b/src/calendar/utils.ts
@@ -36,7 +36,7 @@ export function compareDay(day1: Date, day2: Date) {
   return compareMonthResult;
 }
 
-function getDayByOffset(date: Date, offset: number) {
+export function getDayByOffset(date: Date, offset: number) {
   date = new Date(date);
   date.setDate(date.getDate() + offset);
 
diff --git a/yarn.lock b/yarn.lock
index d80a126dd..6a49d9761 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9031,7 +9031,7 @@ prettier@^1.18.2:
 
 prettier@^2.0.2:
   version "2.0.2"
-  resolved "https://registry.npm.taobao.org/prettier/download/prettier-2.0.2.tgz?cache=0&sync_timestamp=1585003173514&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fprettier%2Fdownload%2Fprettier-2.0.2.tgz#1ba8f3eb92231e769b7fcd7cb73ae1b6b74ade08"
+  resolved "https://registry.npm.taobao.org/prettier/download/prettier-2.0.2.tgz?cache=0&sync_timestamp=1585003590220&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fprettier%2Fdownload%2Fprettier-2.0.2.tgz#1ba8f3eb92231e769b7fcd7cb73ae1b6b74ade08"
   integrity sha1-G6jz65IjHnabf818tzrhtrdK3gg=
 
 pretty-error@^2.1.1: