diff --git a/code/rest/dav_service.go b/code/rest/dav_service.go
index 3ca6f3c..3abf8be 100644
--- a/code/rest/dav_service.go
+++ b/code/rest/dav_service.go
@@ -373,7 +373,7 @@ func (this *DavService) HandleDelete(w http.ResponseWriter, r *http.Request, use
 
 	matter := this.matterDao.CheckWithRootByPath(subPath, user)
 
-	this.matterService.AtomicSoftDelete(r, matter, user)
+	this.matterService.AtomicDelete(r, matter, user)
 }
 
 //crate a directory
diff --git a/code/rest/matter_controller.go b/code/rest/matter_controller.go
index 9e6e286..36421e4 100644
--- a/code/rest/matter_controller.go
+++ b/code/rest/matter_controller.go
@@ -79,6 +79,7 @@ func (this *MatterController) RegisterRoutes() map[string]func(writer http.Respo
 	routeMap["/api/matter/recovery/batch"] = this.Wrap(this.RecoveryBatch, USER_ROLE_USER)
 	routeMap["/api/matter/delete"] = this.Wrap(this.Delete, USER_ROLE_USER)
 	routeMap["/api/matter/delete/batch"] = this.Wrap(this.DeleteBatch, USER_ROLE_USER)
+	routeMap["/api/matter/clean/expired/deleted/matters"] = this.Wrap(this.CleanExpiredDeletedMatters, USER_ROLE_ADMINISTRATOR)
 	routeMap["/api/matter/rename"] = this.Wrap(this.Rename, USER_ROLE_USER)
 	routeMap["/api/matter/change/privacy"] = this.Wrap(this.ChangePrivacy, USER_ROLE_USER)
 	routeMap["/api/matter/move"] = this.Wrap(this.Move, USER_ROLE_USER)
@@ -449,6 +450,14 @@ func (this *MatterController) DeleteBatch(writer http.ResponseWriter, request *h
 	return this.Success("OK")
 }
 
+//manual clean expired deleted matters.
+func (this *MatterController) CleanExpiredDeletedMatters(writer http.ResponseWriter, request *http.Request) *result.WebResult {
+
+	this.matterService.CleanExpiredDeletedMatters()
+
+	return this.Success("OK")
+}
+
 func (this *MatterController) Rename(writer http.ResponseWriter, request *http.Request) *result.WebResult {
 
 	uuid := request.FormValue("uuid")
diff --git a/code/rest/matter_service.go b/code/rest/matter_service.go
index 36960c6..16739ba 100644
--- a/code/rest/matter_service.go
+++ b/code/rest/matter_service.go
@@ -1303,7 +1303,9 @@ func (this *MatterService) CleanExpiredDeletedMatters() {
 
 		thenDate := time.Now()
 		thenDate = thenDate.AddDate(0, 0, int(-preference.DeletedKeepDays))
-		thenDate = util.FirstSecondOfDay(thenDate)
+		if preference.DeletedKeepDays != 0 {
+			thenDate = util.FirstSecondOfDay(thenDate)
+		}
 
 		//first remove all the matter(not dir).
 		this.matterDao.PageHandle("", "", "", FALSE, TRUE, &thenDate, nil, func(matter *Matter) {