diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index e3d424e37..7c8672bb7 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -1001,6 +1001,7 @@ func clearWorkspaceTemp() {
 	os.RemoveAll(filepath.Join(util.TempDir, "import"))
 	os.RemoveAll(filepath.Join(util.TempDir, "repo"))
 	os.RemoveAll(filepath.Join(util.TempDir, "os"))
+	os.RemoveAll(filepath.Join(util.TempDir, "base64"))
 	os.RemoveAll(filepath.Join(util.TempDir, "blocktree.msgpack")) // v2.7.2 前旧版的块树数据
 	os.RemoveAll(filepath.Join(util.TempDir, "blocktree"))         // v3.1.0 前旧版的块树数据