diff --git a/routers/repo/cloudbrain.go b/routers/repo/cloudbrain.go
index fdb1f832d..f0238821c 100755
--- a/routers/repo/cloudbrain.go
+++ b/routers/repo/cloudbrain.go
@@ -284,6 +284,7 @@ func cloudBrainCreate(ctx *context.Context, form auth.CreateCloudBrainForm) {
 	}
 	var datasetInfos map[string]models.DatasetInfo
 	var datasetNames string
+	var attachSize int
 	if uuids != "" {
 		datasetInfos, datasetNames, err = models.GetDatasetInfo(uuids)
 		if err != nil {
@@ -295,12 +296,13 @@ func cloudBrainCreate(ctx *context.Context, form auth.CreateCloudBrainForm) {
 
 		if jobType == string(models.JobTypeDebug) {
 			for _, infos := range datasetInfos {
-				if infos.Size > int(setting.DebugAttachSize  * 1024 * 1024 * 1024) {
-					log.Error("The DatasetSize exceeds the limit (%d)", int(setting.DebugAttachSize)) // GB
-					cloudBrainNewDataPrepare(ctx, jobType)
-					ctx.RenderWithErr(ctx.Tr("cloudbrain.error.debug_datasetsize"), tpl, &form)
-					return
-				}
+				attachSize += infos.Size
+			}
+			if attachSize > int(setting.DebugAttachSize*1024*1024*1024) {
+				log.Error("The DatasetSize exceeds the limit (%d)", int(setting.DebugAttachSize)) // GB
+				cloudBrainNewDataPrepare(ctx, jobType)
+				ctx.RenderWithErr(ctx.Tr("cloudbrain.error.debug_datasetsize"), tpl, &form)
+				return
 			}
 		}
 	}