diff --git a/code/rest/dav_controller.go b/code/rest/dav_controller.go
index b302c7f..5f2781e 100644
--- a/code/rest/dav_controller.go
+++ b/code/rest/dav_controller.go
@@ -163,7 +163,7 @@ func (this *DavController) debug(writer http.ResponseWriter, request *http.Reque
 func (this *DavController) Index(writer http.ResponseWriter, request *http.Request, subPath string) {
 
 	//when debugging. open it.
-	this.debug(writer, request, subPath)
+	//this.debug(writer, request, subPath)
 
 	user := this.CheckCurrentUser(writer, request)
 
diff --git a/code/rest/dav_service.go b/code/rest/dav_service.go
index e56f5bf..3ca6f3c 100644
--- a/code/rest/dav_service.go
+++ b/code/rest/dav_service.go
@@ -200,7 +200,7 @@ func (this *DavService) HandlePropfind(writer http.ResponseWriter, request *http
 		matters = []*Matter{matter}
 	} else {
 		// len(matters) == 0 means empty directory
-		matters = this.matterDao.FindByPuuidAndUserUuid(matter.Uuid, user.Uuid, nil)
+		matters = this.matterDao.FindByPuuidAndUserUuidAndDeleted(matter.Uuid, user.Uuid, FALSE, nil)
 
 		//add this matter to head.
 		matters = append([]*Matter{matter}, matters...)
@@ -373,7 +373,7 @@ func (this *DavService) HandleDelete(w http.ResponseWriter, r *http.Request, use
 
 	matter := this.matterDao.CheckWithRootByPath(subPath, user)
 
-	this.matterService.AtomicDelete(r, matter, user)
+	this.matterService.AtomicSoftDelete(r, matter, user)
 }
 
 //crate a directory
diff --git a/code/rest/matter_dao.go b/code/rest/matter_dao.go
index 161433f..0394e5f 100644
--- a/code/rest/matter_dao.go
+++ b/code/rest/matter_dao.go
@@ -213,10 +213,19 @@ func (this *MatterDao) FindByUserUuidAndPuuidAndDirAndName(userUuid string, puui
 }
 
 func (this *MatterDao) FindByPuuidAndUserUuid(puuid string, userUuid string, sortArray []builder.OrderPair) []*Matter {
+	return this.FindByPuuidAndUserUuidAndDeleted(puuid, userUuid, "", sortArray)
+}
+
+func (this *MatterDao) FindByPuuidAndUserUuidAndDeleted(puuid string, userUuid string, deleted string, sortArray []builder.OrderPair) []*Matter {
 	var matters []*Matter
 
 	var wp = &builder.WherePair{}
 	wp = wp.And(&builder.WherePair{Query: "puuid = ? AND user_uuid = ?", Args: []interface{}{puuid, userUuid}})
+	if deleted == TRUE {
+		wp = wp.And(&builder.WherePair{Query: "deleted = 1", Args: []interface{}{}})
+	} else if deleted == FALSE {
+		wp = wp.And(&builder.WherePair{Query: "deleted = 0", Args: []interface{}{}})
+	}
 
 	if sortArray == nil {
 
@@ -429,13 +438,13 @@ func (this *MatterDao) SoftDelete(matter *Matter) {
 		}
 
 		//soft delete from db.
-		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": 1})
+		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": 1, "delete_time": time.Now()})
 		this.PanicError(db.Error)
 
 	} else {
 
 		//soft delete from db.
-		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": 1})
+		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": 1, "delete_time": time.Now()})
 		this.PanicError(db.Error)
 
 		//no need to delete its image cache.
diff --git a/code/rest/matter_model.go b/code/rest/matter_model.go
index da52442..5ec221e 100644
--- a/code/rest/matter_model.go
+++ b/code/rest/matter_model.go
@@ -31,21 +31,22 @@ const (
  */
 type Matter struct {
 	Base
-	Puuid     string    `json:"puuid" gorm:"type:char(36);index:idx_puuid"`
-	UserUuid  string    `json:"userUuid" gorm:"type:char(36);index:idx_uu"`
-	Username  string    `json:"username" gorm:"type:varchar(45) not null"`
-	Dir       bool      `json:"dir" gorm:"type:tinyint(1) not null;default:0"`
-	Name      string    `json:"name" gorm:"type:varchar(255) not null"`
-	Md5       string    `json:"md5" gorm:"type:varchar(45)"`
-	Size      int64     `json:"size" gorm:"type:bigint(20) not null;default:0"`
-	Privacy   bool      `json:"privacy" gorm:"type:tinyint(1) not null;default:0"`
-	Path      string    `json:"path" gorm:"type:varchar(1024)"`
-	Times     int64     `json:"times" gorm:"type:bigint(20) not null;default:0"`
-	Parent    *Matter   `json:"parent" gorm:"-"`
-	Children  []*Matter `json:"-" gorm:"-"`
-	Prop      string    `json:"prop" gorm:"type:varchar(1024) not null;default:'{}'"`
-	VisitTime time.Time `json:"visitTime" gorm:"type:timestamp not null;default:'2018-01-01 00:00:00'"`
-	Deleted   bool      `json:"deleted" gorm:"type:tinyint(1) not null;default:0"`
+	Puuid      string    `json:"puuid" gorm:"type:char(36);index:idx_puuid"`
+	UserUuid   string    `json:"userUuid" gorm:"type:char(36);index:idx_uu"`
+	Username   string    `json:"username" gorm:"type:varchar(45) not null"`
+	Dir        bool      `json:"dir" gorm:"type:tinyint(1) not null;default:0"`
+	Name       string    `json:"name" gorm:"type:varchar(255) not null"`
+	Md5        string    `json:"md5" gorm:"type:varchar(45)"`
+	Size       int64     `json:"size" gorm:"type:bigint(20) not null;default:0"`
+	Privacy    bool      `json:"privacy" gorm:"type:tinyint(1) not null;default:0"`
+	Path       string    `json:"path" gorm:"type:varchar(1024)"`
+	Times      int64     `json:"times" gorm:"type:bigint(20) not null;default:0"`
+	Parent     *Matter   `json:"parent" gorm:"-"`
+	Children   []*Matter `json:"-" gorm:"-"`
+	Prop       string    `json:"prop" gorm:"type:varchar(1024) not null;default:'{}'"`
+	VisitTime  time.Time `json:"visitTime" gorm:"type:timestamp not null;default:'2018-01-01 00:00:00'"`
+	Deleted    bool      `json:"deleted" gorm:"type:tinyint(1) not null;default:0"`
+	DeleteTime time.Time `json:"deleteTime" gorm:"type:timestamp not null;default:'2018-01-01 00:00:00'"`
 }
 
 // set File's table name to be `profiles`