diff --git a/api.go b/api.go
index cfd6637..3b8e349 100644
--- a/api.go
+++ b/api.go
@@ -2,54 +2,51 @@ package coming
 
 import "errors"
 
-//访问Stop()接口失败,没有成功关闭
-//
-type StopRefuseError struct{}
-
-func (StopRefuseError) Error() string {
-	return "Process refused to stop."
-}
-
+//TaskInterface contains methods of a task need implement
 type TaskInterface interface {
 	//正常启动目标返回nil,否则返回错误信息,程序执行期间阻塞
 	Run() error
+	//Stop can stop task next running,and the running task will run before finished
 	//实现改接口,以调用Stop()进行停止当前携程,本质是在执行过程中,通过通道传递信号,使得协程停止
 	//执行stop方法,当程序正常停止时返回nil,当程序停止被拒绝,返回StopRefuseError,当程序停止
 	//成功,但是报错时,将返回对应的错误信息
 	Stop() error
+	//Start to run all tasks from header
 	//如果完成了Start()操作则返回nil,否则返回err信息
 	Start() error
 	//Pause to stop next task , resume to allow run
 	Pause()
-	//Pause to stop next task , resume to allow run
+	//Resume to allow run ,Pause to stop next task
 	Resume()
 }
 
+//BaseTask is an default task with method always return message not nil.
+//it will make you only focus on the method you will use
 type BaseTask struct{}
 
 //正常启动目标返回nil,否则返回错误信息,程序执行期间阻塞
-func (this BaseTask) Run() error {
+func (bt BaseTask) Run() error {
 	return errors.New("you need override Run() method")
 }
 
 //实现改接口,以调用Stop()进行停止当前携程,本质是在执行过程中,通过通道传递信号,使得协程停止
 //执行stop方法,当程序正常停止时返回nil,当程序停止被拒绝,返回StopRefuseError,当程序停止
 //成功,但是报错时,将返回对应的错误信息
-func (this BaseTask) Stop() error {
+func (bt BaseTask) Stop() error {
 	return errors.New("you need override Stop() method")
 }
 
 //如果完成了Start()操作则返回nil,否则返回err信息
-func (this BaseTask) Start() error {
+func (bt BaseTask) Start() error {
 	return errors.New("you need override Start() method")
 }
 
 //Pause to stop next task , resume to allow run
-func (this BaseTask) Pause() {
+func (bt BaseTask) Pause() {
 	panic("you need override Pause() and Resume() method to use this function")
 }
 
 //Pause to stop next task , resume to allow run
-func (this BaseTask) Resume() {
+func (bt BaseTask) Resume() {
 	panic("you need override Pause() and Resume() method to use this function")
 }
diff --git a/schedule_task.go b/schedule_task.go
index 1e2586b..c609632 100644
--- a/schedule_task.go
+++ b/schedule_task.go
@@ -18,10 +18,10 @@ var (
 	locker sync.RWMutex
 )
 
+// NewSchedule create a new scheduled task and append to tasks,whitch will be checked every second.
+// this schedule task can match any time in a year with minimum precision second
 // 这个function新建一个简单定时任务到后台任务集,schedule可以通过month, day, weekday, hour, minute, second.
 // 这6个字段匹配到一年中的任意时刻,最小精度为秒
-// this function create a new scheduled task and append to tasks,whitch will be checked every second.
-// this schedule task can match any time in a year with minimum precision second
 func NewSchedule(month, day, weekday, hour, minute, second int8, name string, task func(time.Time)) {
 	cj := schedule{month, day, weekday, hour, minute, second, task}
 	locker.Lock()
@@ -29,30 +29,32 @@ func NewSchedule(month, day, weekday, hour, minute, second int8, name string, ta
 	tasks[name] = cj
 }
 
+// RemoveSchedule can remove schedule task safely
 func RemoveSchedule(name string) {
 	locker.Lock()
 	defer locker.Unlock()
 	delete(tasks, name)
 }
 
+// NewMonthlySchedule creates a new schedule task matched any exactly time in a month.
 // 创建一个定时任务,匹配一个月中的任意时间,但时间必须是明确的
-// this creates a new scheduled task matched any exactly time in a month.
 func NewMonthlySchedule(day, hour, minute, second int8, name string, task func(time.Time)) {
 	NewSchedule(ANY, day, ANY, hour, minute, second, name, task)
 }
 
+// NewWeeklySchedule creates a new scheduled task matched any exactly time in a week.
 // 创建一个定时任务,匹配一周中的任意时间,但时间必须是明确的
-// this creates a new scheduled task matched any exactly time in a week.
 func NewWeeklySchedule(weekday, hour, minute, second int8, name string, task func(time.Time)) {
 	NewSchedule(ANY, ANY, weekday, hour, minute, second, name, task)
 }
 
+// NewDailySchedule creates a new scheduled task matched any exactly time of day.
 // 创建一个定时任务,匹配一天中的任意时间,但时间必须是明确的
-// this creates a new scheduled task matched any exactly time of day.
 func NewDailySchedule(hour, minute, second int8, name string, task func(time.Time)) {
 	NewSchedule(ANY, ANY, ANY, hour, minute, second, name, task)
 }
 
+//Matches will match now time to execute task function
 func (sc schedule) Matches(t time.Time) (ok bool) {
 	ok = (sc.Month == ANY || sc.Month == int8(t.Month())) &&
 		(sc.Day == ANY || sc.Day == int8(t.Day())) &&
diff --git a/schedule_task_test.go b/schedule_task_test.go
index 90bfc68..892ce5c 100644
--- a/schedule_task_test.go
+++ b/schedule_task_test.go
@@ -6,12 +6,6 @@ import (
 	"time"
 )
 
-/**
- * @author anyang
- * Email: 1300378587@qq.com
- * Created Date:2020-06-21 11:35
- */
-
 func TestNewSchedule(t *testing.T) {
 
 	NewDailySchedule(ANY, ANY, ANY, "小任务", func(t time.Time) {
diff --git a/task.go b/task.go
index b086d4f..ee541a9 100644
--- a/task.go
+++ b/task.go
@@ -6,9 +6,8 @@ import (
 	"log"
 )
 
-//定义可执行的方法
-
-//适合执行顺序长时间任务
+// Task struct should be used for task that will running for long time so
+// that you can use other methods like Pause() before finish
 type Task struct {
 	BaseTask
 	status bool
@@ -21,13 +20,15 @@ type Task struct {
 	data   map[int]interface{}
 }
 
-//func(this *Task,index int){
+// TaskItem e.g.
+// func(task *Task,index int){
 //    //do something
-//    //if there is result you need ,you can put it into this.data[index]
-//    this.data[index] = result
+//    //if there is result you need ,you can put it into task.data[index]
+//    task.data[index] = result
 //}
 type TaskItem func(*Task, int) error
 
+// New create a new Task schedule,you can use method to operate you taskItem
 func (Task) New() *Task {
 	return &Task{
 		status: false,
@@ -41,102 +42,103 @@ func (Task) New() *Task {
 	}
 }
 
-//
-func (this *Task) Add(t TaskItem) *Task {
-	if this.works == nil {
+// Add function add a TaskItem into Task
+func (task *Task) Add(t TaskItem) *Task {
+	if task.works == nil {
 		panic("please use Task.New() create Task")
 	}
-	if this.status {
+	if task.status {
 		panic("This Task had start ,can not add")
 	}
-	this.works = append(this.works, t)
-	return this
+	task.works = append(task.works, t)
+	return task
 }
 
-//this function will start a waiting for run TaskItem of slice
-func (this *Task) Start() error {
-	this.status = true
+// Start function will start a waiting for run TaskItem of slice
+func (task *Task) Start() error {
+	task.status = true
 	go func() {
-		<-this.start
-		for index, _ := range this.works {
+		<-task.start
+		for index, _ := range task.works {
 			select {
-			case <-this.stop:
+			case <-task.stop:
 				//关闭其他通道
-				close(this.start)
-				close(this.pause)
-				close(this.stop)
-				log.Print(&this, " has stop")
+				close(task.start)
+				close(task.pause)
+				close(task.stop)
+				log.Print(&task, " has stop")
 				goto END
-			case <-this.pause:
-				this.pause <- 2
+			case <-task.pause:
+				task.pause <- 2
 			default:
 			}
-			this.Exec(index)
+			task.Exec(index)
 		}
 	END:
-		this.finish = true
-		this.wait <- 1
-		this.status = false
+		task.finish = true
+		task.wait <- 1
+		task.status = false
 	}()
 	return nil
 }
 
-func (this *Task) Exec(index int) {
-	this.works[index](this, index)
+// Exec will execute taskItem function in
+func (task *Task) Exec(index int) {
+	task.works[index](task, index)
 }
 
-func (this *Task) WaitFinish() int {
-	result := <-this.wait
-	close(this.wait)
+func (task *Task) WaitFinish() int {
+	result := <-task.wait
+	close(task.wait)
 	return result
 }
 
 //当需要再次执行Start时可以重新刷新,在此之前需要执行stop,并等待关闭完成
-func (this *Task) Flush() bool {
-	if this.finish {
-		this.start = make(chan int, 1)
-		this.stop = make(chan int, 1)
-		this.pause = make(chan int)
-		this.wait = make(chan int)
-		this.status = false
-		this.finish = false
+func (task *Task) Flush() bool {
+	if task.finish {
+		task.start = make(chan int, 1)
+		task.stop = make(chan int, 1)
+		task.pause = make(chan int)
+		task.wait = make(chan int)
+		task.status = false
+		task.finish = false
 		return true
 	}
 	return false
 }
 
-func (this *Task) Stop() error {
+func (task *Task) Stop() error {
 	var err error
 	defer func() {
 		if err1 := recover(); err != nil {
 			err = fmt.Errorf("%v", err1)
 		}
 	}()
-	this.stop <- 1
+	task.stop <- 1
 	return err
 }
 
-func (this *Task) Run() error {
+func (task *Task) Run() error {
 	var err error
-	if !this.status {
+	if !task.status {
 		err = errors.New("please do Start() function before Run()")
 		return err
 	}
-	this.start <- 1
+	task.start <- 1
 	return err
 }
 
-// 如果多处触发Pause()可能会导致阻塞，建议 go this.Pause(),利用channel阻塞进行暂停
-func (this *Task) Pause() {
-	this.pause <- 1
+// 如果多处触发Pause()可能会导致阻塞，建议 go task.Pause(),利用channel阻塞进行暂停
+func (task *Task) Pause() {
+	task.pause <- 1
 }
 
-// 如果多处触发Resume()可能会导致阻塞，建议 go this.Pause()
-func (this *Task) Resume() {
-	<-this.pause
+// 如果多处触发Resume()可能会导致阻塞，建议 go task.Pause()
+func (task *Task) Resume() {
+	<-task.pause
 }
 
-//this need user put result of TaskItem into data ,and key is index ,value is result
-func (this *Task) Call() (map[int]interface{}, error) {
-	return this.data, nil
+//task need user put result of TaskItem into data ,and key is index ,value is result
+func (task *Task) Call() (map[int]interface{}, error) {
+	return task.data, nil
 }