diff --git a/models/repo.go b/models/repo.go
index 7948346c5..fda5460f5 100755
--- a/models/repo.go
+++ b/models/repo.go
@@ -11,6 +11,7 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
+	"xorm.io/xorm"
 
 	"code.gitea.io/gitea/modules/blockchain"
 
@@ -1632,6 +1633,9 @@ func DeleteRepository(doer *User, uid, repoID int64) error {
 		releaseAttachments = append(releaseAttachments, attachments[i].RelativePath())
 	}
 
+	// Delete dataset attachment record and remove related files
+	deleteDatasetAttachmentByRepoId(sess, repoID)
+
 	if err = deleteBeans(sess,
 		&Access{RepoID: repo.ID},
 		&Action{RepoID: repo.ID},
@@ -1817,6 +1821,20 @@ func DeleteRepository(doer *User, uid, repoID int64) error {
 	return nil
 }
 
+func deleteDatasetAttachmentByRepoId(sess *xorm.Session, repoId int64) error {
+	attachments := make([]*Attachment, 0)
+	if err := sess.Join("INNER", "dataset", "dataset.id = attachment.dataset_id").
+		Where("dataset.repo_id = ?", repoId).
+		Find(&attachments); err != nil {
+		return err
+	}
+	if len(attachments) == 0 {
+		return nil
+	}
+	_, err := DeleteAttachments(attachments, true)
+	return err
+}
+
 // GetRepositoryByOwnerAndName returns the repository by given ownername and reponame.
 func GetRepositoryByOwnerAndName(ownerName, repoName string) (*Repository, error) {
 	return getRepositoryByOwnerAndName(x, ownerName, repoName)