diff --git a/uni_modules/uni-datetime-picker/components/uni-datetime-picker/util.js b/uni_modules/uni-datetime-picker/components/uni-datetime-picker/util.js
new file mode 100644
index 0000000..bc9d481
--- /dev/null
+++ b/uni_modules/uni-datetime-picker/components/uni-datetime-picker/util.js
@@ -0,0 +1,421 @@
+class Calendar {
+	constructor({
+		selected,
+		startDate,
+		endDate,
+		range,
+	} = {}) {
+		// 当前日期
+		this.date = this.getDateObj(new Date()) // 当前初入日期
+		// 打点信息
+		this.selected = selected || [];
+		// 起始时间
+		this.startDate = startDate
+		// 终止时间
+		this.endDate = endDate
+		// 是否范围选择
+		this.range = range
+		// 多选状态
+		this.cleanMultipleStatus()
+		// 每周日期
+		this.weeks = {}
+		this.lastHover = false
+	}
+	/**
+	 * 设置日期
+	 * @param {Object} date
+	 */
+	setDate(date) {
+		const selectDate = this.getDateObj(date)
+		this.getWeeks(selectDate.fullDate)
+	}
+
+	/**
+	 * 清理多选状态
+	 */
+	cleanMultipleStatus() {
+		this.multipleStatus = {
+			before: '',
+			after: '',
+			data: []
+		}
+	}
+
+	setStartDate(startDate) {
+		this.startDate = startDate
+	}
+
+	setEndDate(endDate) {
+		this.endDate = endDate
+	}
+
+	getPreMonthObj(date) {
+		date = fixIosDateFormat(date)
+		date = new Date(date)
+
+		const oldMonth = date.getMonth()
+		date.setMonth(oldMonth - 1)
+		const newMonth = date.getMonth()
+		if (oldMonth !== 0 && newMonth - oldMonth === 0) {
+			date.setMonth(newMonth - 1)
+		}
+		return this.getDateObj(date)
+	}
+	getNextMonthObj(date) {
+		date = fixIosDateFormat(date)
+		date = new Date(date)
+
+		const oldMonth = date.getMonth()
+		date.setMonth(oldMonth + 1)
+		const newMonth = date.getMonth()
+		if (newMonth - oldMonth > 1) {
+			date.setMonth(newMonth - 1)
+		}
+		return this.getDateObj(date)
+	}
+
+	/**
+	 * 获取指定格式Date对象
+	 */
+	getDateObj(date) {
+		date = fixIosDateFormat(date)
+		date = new Date(date)
+
+		return {
+			fullDate: getDate(date),
+			year: date.getFullYear(),
+			month: addZero(date.getMonth() + 1),
+			date: addZero(date.getDate()),
+			day: date.getDay()
+		}
+	}
+
+	/**
+	 * 获取上一个月日期集合
+	 */
+	getPreMonthDays(amount, dateObj) {
+		const result = []
+		for (let i = amount - 1; i >= 0; i--) {
+			const month = dateObj.month - 1
+			result.push({
+				date: new Date(dateObj.year, month, -i).getDate(),
+				month,
+				disable: true
+			})
+		}
+		return result
+	}
+	/**
+	 * 获取本月日期集合
+	 */
+	getCurrentMonthDays(amount, dateObj) {
+		const result = []
+		const fullDate = this.date.fullDate
+		for (let i = 1; i <= amount; i++) {
+			const currentDate = `${dateObj.year}-${dateObj.month}-${addZero(i)}`
+			const isToday = fullDate === currentDate
+			// 获取打点信息
+			const info = this.selected && this.selected.find((item) => {
+				if (this.dateEqual(currentDate, item.date)) {
+					return item
+				}
+			})
+
+			// 日期禁用
+			let disableBefore = true
+			let disableAfter = true
+			if (this.startDate) {
+				disableBefore = dateCompare(this.startDate, currentDate)
+			}
+
+			if (this.endDate) {
+				disableAfter = dateCompare(currentDate, this.endDate)
+			}
+
+			let multiples = this.multipleStatus.data
+			let multiplesStatus = -1
+			if (this.range && multiples) {
+				multiplesStatus = multiples.findIndex((item) => {
+					return this.dateEqual(item, currentDate)
+				})
+			}
+			const checked = multiplesStatus !== -1
+
+			result.push({
+				fullDate: currentDate,
+				year: dateObj.year,
+				date: i,
+				multiple: this.range ? checked : false,
+				beforeMultiple: this.isLogicBefore(currentDate, this.multipleStatus.before, this.multipleStatus.after),
+				afterMultiple: this.isLogicAfter(currentDate, this.multipleStatus.before, this.multipleStatus.after),
+				month: dateObj.month,
+				disable: (this.startDate && !dateCompare(this.startDate, currentDate)) || (this.endDate && !dateCompare(
+					currentDate, this.endDate)),
+				isToday,
+				userChecked: false,
+				extraInfo: info
+			})
+		}
+		return result
+	}
+	/**
+	 * 获取下一个月日期集合
+	 */
+	_getNextMonthDays(amount, dateObj) {
+		const result = []
+		const month = dateObj.month + 1
+		for (let i = 1; i <= amount; i++) {
+			result.push({
+				date: i,
+				month,
+				disable: true
+			})
+		}
+		return result
+	}
+
+	/**
+	 * 获取当前日期详情
+	 * @param {Object} date
+	 */
+	getInfo(date) {
+		if (!date) {
+			date = new Date()
+		}
+		const res = this.calendar.find(item => item.fullDate === this.getDateObj(date).fullDate)
+		return res ? res : this.getDateObj(date)
+	}
+
+	/**
+	 * 比较时间是否相等
+	 */
+	dateEqual(before, after) {
+		before = new Date(fixIosDateFormat(before))
+		after = new Date(fixIosDateFormat(after))
+		return before.valueOf() === after.valueOf()
+	}
+
+	/**
+	 *  比较真实起始日期
+	 */
+
+	isLogicBefore(currentDate, before, after) {
+		let logicBefore = before
+		if (before && after) {
+			logicBefore = dateCompare(before, after) ? before : after
+		}
+		return this.dateEqual(logicBefore, currentDate)
+	}
+
+	isLogicAfter(currentDate, before, after) {
+		let logicAfter = after
+		if (before && after) {
+			logicAfter = dateCompare(before, after) ? after : before
+		}
+		return this.dateEqual(logicAfter, currentDate)
+	}
+
+	/**
+	 * 获取日期范围内所有日期
+	 * @param {Object} begin
+	 * @param {Object} end
+	 */
+	geDateAll(begin, end) {
+		var arr = []
+		var ab = begin.split('-')
+		var ae = end.split('-')
+		var db = new Date()
+		db.setFullYear(ab[0], ab[1] - 1, ab[2])
+		var de = new Date()
+		de.setFullYear(ae[0], ae[1] - 1, ae[2])
+		var unixDb = db.getTime() - 24 * 60 * 60 * 1000
+		var unixDe = de.getTime() - 24 * 60 * 60 * 1000
+		for (var k = unixDb; k <= unixDe;) {
+			k = k + 24 * 60 * 60 * 1000
+			arr.push(this.getDateObj(new Date(parseInt(k))).fullDate)
+		}
+		return arr
+	}
+
+	/**
+	 *  获取多选状态
+	 */
+	setMultiple(fullDate) {
+		if (!this.range) return
+
+		let {
+			before,
+			after
+		} = this.multipleStatus
+		if (before && after) {
+			if (!this.lastHover) {
+				this.lastHover = true
+				return
+			}
+			this.multipleStatus.before = fullDate
+			this.multipleStatus.after = ''
+			this.multipleStatus.data = []
+			this.multipleStatus.fulldate = ''
+			this.lastHover = false
+		} else {
+			if (!before) {
+				this.multipleStatus.before = fullDate
+				this.multipleStatus.after = undefined;
+				this.lastHover = false
+			} else {
+				this.multipleStatus.after = fullDate
+				if (dateCompare(this.multipleStatus.before, this.multipleStatus.after)) {
+					this.multipleStatus.data = this.geDateAll(this.multipleStatus.before, this.multipleStatus
+						.after);
+				} else {
+					this.multipleStatus.data = this.geDateAll(this.multipleStatus.after, this.multipleStatus
+						.before);
+				}
+				this.lastHover = true
+			}
+		}
+		this.getWeeks(fullDate)
+	}
+
+	/**
+	 *  鼠标 hover 更新多选状态
+	 */
+	setHoverMultiple(fullDate) {
+		//抖音小程序点击会触发hover事件，需要避免一下
+		// #ifndef MP-TOUTIAO
+		if (!this.range || this.lastHover) return
+		const {
+			before
+		} = this.multipleStatus
+
+		if (!before) {
+			this.multipleStatus.before = fullDate
+		} else {
+			this.multipleStatus.after = fullDate
+			if (dateCompare(this.multipleStatus.before, this.multipleStatus.after)) {
+				this.multipleStatus.data = this.geDateAll(this.multipleStatus.before, this.multipleStatus.after);
+			} else {
+				this.multipleStatus.data = this.geDateAll(this.multipleStatus.after, this.multipleStatus.before);
+			}
+		}
+		this.getWeeks(fullDate)
+		// #endif
+
+	}
+
+	/**
+	 * 更新默认值多选状态
+	 */
+	setDefaultMultiple(before, after) {
+		this.multipleStatus.before = before
+		this.multipleStatus.after = after
+		if (before && after) {
+			if (dateCompare(before, after)) {
+				this.multipleStatus.data = this.geDateAll(before, after);
+				this.getWeeks(after)
+			} else {
+				this.multipleStatus.data = this.geDateAll(after, before);
+				this.getWeeks(before)
+			}
+		}
+	}
+
+	/**
+	 * 获取每周数据
+	 * @param {Object} dateData
+	 */
+	getWeeks(dateData) {
+		const {
+			year,
+			month,
+		} = this.getDateObj(dateData)
+
+		const preMonthDayAmount = new Date(year, month - 1, 1).getDay()
+		const preMonthDays = this.getPreMonthDays(preMonthDayAmount, this.getDateObj(dateData))
+
+		const currentMonthDayAmount = new Date(year, month, 0).getDate()
+		const currentMonthDays = this.getCurrentMonthDays(currentMonthDayAmount, this.getDateObj(dateData))
+
+		const nextMonthDayAmount = 42 - preMonthDayAmount - currentMonthDayAmount
+		const nextMonthDays = this._getNextMonthDays(nextMonthDayAmount, this.getDateObj(dateData))
+
+		const calendarDays = [...preMonthDays, ...currentMonthDays, ...nextMonthDays]
+
+		const weeks = new Array(6)
+		for (let i = 0; i < calendarDays.length; i++) {
+			const index = Math.floor(i / 7)
+			if (!weeks[index]) {
+				weeks[index] = new Array(7)
+			}
+			weeks[index][i % 7] = calendarDays[i]
+		}
+
+		this.calendar = calendarDays
+		this.weeks = weeks
+	}
+}
+
+function getDateTime(date, hideSecond) {
+	return `${getDate(date)} ${getTime(date, hideSecond)}`
+}
+
+function getDate(date) {
+	date = fixIosDateFormat(date)
+	date = new Date(date)
+	const year = date.getFullYear()
+	const month = date.getMonth() + 1
+	const day = date.getDate()
+	return `${year}-${addZero(month)}-${addZero(day)}`
+}
+
+function getTime(date, hideSecond) {
+	date = fixIosDateFormat(date)
+	date = new Date(date)
+	const hour = date.getHours()
+	const minute = date.getMinutes()
+	const second = date.getSeconds()
+	return hideSecond ? `${addZero(hour)}:${addZero(minute)}` : `${addZero(hour)}:${addZero(minute)}:${addZero(second)}`
+}
+
+function addZero(num) {
+	if (num < 10) {
+		num = `0${num}`
+	}
+	return num
+}
+
+function getDefaultSecond(hideSecond) {
+	return hideSecond ? '00:00' : '00:00:00'
+}
+
+function dateCompare(startDate, endDate) {
+	startDate = new Date(fixIosDateFormat(startDate))
+	endDate = new Date(fixIosDateFormat(endDate))
+	return startDate <= endDate
+}
+
+function checkDate(date) {
+	const dateReg = /((19|20)\d{2})(-|\/)\d{1,2}(-|\/)\d{1,2}/g
+	return date.match(dateReg)
+}
+//ios低版本15及以下，无法匹配 没有 ’秒‘ 时的情况，所以需要在末尾 秒 加上 问号
+const dateTimeReg = /^\d{4}-(0?[1-9]|1[012])-(0?[1-9]|[12][0-9]|3[01])( [0-5]?[0-9]:[0-5]?[0-9](:[0-5]?[0-9])?)?$/;
+
+function fixIosDateFormat(value) {
+	if (typeof value === 'string' && dateTimeReg.test(value)) {
+		value = value.replace(/-/g, '/')
+	}
+	return value
+}
+
+export {
+	Calendar,
+	getDateTime,
+	getDate,
+	getTime,
+	addZero,
+	getDefaultSecond,
+	dateCompare,
+	checkDate,
+	fixIosDateFormat
+}