diff --git a/modules/cron/tasks_basic.go b/modules/cron/tasks_basic.go
index e238418d8..207018c20 100755
--- a/modules/cron/tasks_basic.go
+++ b/modules/cron/tasks_basic.go
@@ -11,7 +11,6 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/migrations"
 	repository_service "code.gitea.io/gitea/modules/repository"
-	api_repo "code.gitea.io/gitea/routers/api/v1/repo"
 	"code.gitea.io/gitea/routers/repo"
 	mirror_service "code.gitea.io/gitea/services/mirror"
 )
@@ -186,17 +185,6 @@ func registerHandleSummaryStatistic() {
 	})
 }
 
-func registerHandleClearRepoStatisticFile() {
-	RegisterTaskFatal("handle_repo_clear_statistic_file", &BaseConfig{
-		Enabled:    true,
-		RunAtStart: false,
-		Schedule:   "@daily",
-	}, func(ctx context.Context, _ *models.User, _ Config) error {
-		api_repo.ClearUnusedStatisticsFile()
-		return nil
-	})
-}
-
 func initBasicTasks() {
 	registerUpdateMirrorTask()
 	registerRepoHealthCheck()
diff --git a/routers/api/v1/repo/repo_dashbord.go b/routers/api/v1/repo/repo_dashbord.go
index 2becdd59f..041162039 100644
--- a/routers/api/v1/repo/repo_dashbord.go
+++ b/routers/api/v1/repo/repo_dashbord.go
@@ -2,7 +2,6 @@ package repo
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -174,7 +173,7 @@ func ServeAllProjectsPeriodStatisticsFile(ctx *context.Context) {
 		return
 	}
 	var projectAnalysis = ctx.Tr("repo.repo_stat_inspect")
-	fileName, frontName := getFileName(ctx, beginTime, endTime, projectAnalysis)
+	fileName := getFileName(ctx, beginTime, endTime, projectAnalysis)
 
 	if err := os.MkdirAll(setting.RadarMap.Path, os.ModePerm); err != nil {
 		ctx.Error(http.StatusBadRequest, fmt.Errorf("Failed to create dir %s: %v", setting.AvatarUploadPath, err).Error())
@@ -207,17 +206,14 @@ func ServeAllProjectsPeriodStatisticsFile(ctx *context.Context) {
 	f.SetActiveSheet(index)
 	f.DeleteSheet("Sheet1")
 
-	if err := f.SaveAs(fileName); err != nil {
-		log.Error("Can not generate file.", err)
-		ctx.Error(http.StatusBadRequest, ctx.Tr("repo.generate_statistic_file_error"))
-		return
-	}
+	ctx.Resp.Header().Set("Content-Disposition", "attachment; filename="+url.QueryEscape(fileName))
+	ctx.Resp.Header().Set("Content-Type", "application/octet-stream")
 
-	ctx.ServeFile(fileName, url.QueryEscape(frontName))
+	f.WriteTo(ctx.Resp)
 
 }
 
-func getFileName(ctx *context.Context, beginTime time.Time, endTime time.Time, projectAnalysis string) (string, string) {
+func getFileName(ctx *context.Context, beginTime time.Time, endTime time.Time, projectAnalysis string) string {
 	baseName := setting.RadarMap.Path + "/" + projectAnalysis + "_"
 
 	if ctx.QueryTrim("q") != "" {
@@ -229,23 +225,7 @@ func getFileName(ctx *context.Context, beginTime time.Time, endTime time.Time, p
 		baseName = baseName + beginTime.AddDate(0, 0, -1).Format(EXCEL_DATE_FORMAT) + "_" + endTime.AddDate(0, 0, -1).Format(EXCEL_DATE_FORMAT)
 	}
 	frontName := baseName + ".xlsx"
-	localName := baseName + "_" + strconv.FormatInt(time.Now().Unix(), 10) + ".xlsx"
-	return localName, path.Base(frontName)
-}
-
-func ClearUnusedStatisticsFile() {
-	fileInfos, err := ioutil.ReadDir(setting.RadarMap.Path)
-	if err != nil {
-		log.Warn("can not read dir: "+setting.RadarMap.Path, err)
-		return
-	}
-
-	for _, fileInfo := range fileInfos {
-		if !fileInfo.IsDir() && fileInfo.ModTime().Before(time.Now().AddDate(0, 0, -1)) {
-			os.Remove(path.Join(setting.RadarMap.Path, fileInfo.Name()))
-		}
-	}
-
+	return path.Base(frontName)
 }
 
 func allProjectsPeroidHeader(ctx *context.Context) map[string]string {