diff --git a/listhead.go b/listhead.go
index 65e6b71..b9ec4e6 100644
--- a/listhead.go
+++ b/listhead.go
@@ -6,10 +6,10 @@ type ListHead struct {
 	data interface{}
 }
 
-func (this *ListHead) Init() {
+func (this *ListHead) Init(data interface{}) {
 	this.next = this
 	this.prev = this
-	this.data = nil
+	this.data = data
 }
 
 func (this *ListHead) Del() {
@@ -36,12 +36,12 @@ func (this *ListHead) Replace(pnew *ListHead) {
 	pnew.next.prev = pnew
 	pnew.prev = this.prev
 	pnew.prev.next = pnew
-	pnew.data = this.data
 }
 
 func (this *ListHead) ReplaceInit(pnew *ListHead) {
 	this.Replace(pnew)
-	this.Init()
+	this.next = this
+	this.prev = this
 }
 
 func (this *ListHead) Empty() bool {
@@ -50,5 +50,6 @@ func (this *ListHead) Empty() bool {
 
 func (this *ListHead) DelInit() {
 	this.Del()
-	this.Init()
+	this.next = this
+	this.prev = this
 }
diff --git a/timer.go b/timer.go
index 06fecfd..2efb277 100644
--- a/timer.go
+++ b/timer.go
@@ -38,7 +38,7 @@ func (this *Timer) Init(
 	cacheTimerNum int32)  {
 	initListHeadFunc := func (data interface{}) {
 		head := data.(*ListHead)
-		head.Init()
+		head.Init(nil)
 	}
 	initListHeadFunc(&this.freeTimerList)
 	TraverseArray(&this.tv1, initListHeadFunc)
@@ -122,7 +122,7 @@ func (this *Timer) Update() {
 func (this *Timer) NewTimerAttacher() *TimerAttacher {
 	attacher := new(TimerAttacher)
 	attacher.timer = this
-	attacher.timers.Init()
+	attacher.timers.Init(nil)
 	return attacher
 }
 
diff --git a/timerlist.go b/timerlist.go
index 51e7599..5d21577 100644
--- a/timerlist.go
+++ b/timerlist.go
@@ -49,8 +49,8 @@ func (this *TimerList) reset() {
 }
 
 func (this *TimerList) init() {
-	this.entry.Init()
-	this.attachEntry.Init()
+	this.entry.Init(this)
+	this.attachEntry.Init(this)
 }
 
 func (this *TimerList) SetTimerAfterFunc(timerAfterFunc func(*XParams)) {
@@ -58,6 +58,5 @@ func (this *TimerList) SetTimerAfterFunc(timerAfterFunc func(*XParams)) {
 }
 
 func (this *TimerList) Attach(timerAttacher *TimerAttacher) {
-	this.attachEntry.data = this
 	timerAttacher.timers.AddTail(&this.attachEntry)
 }