diff --git a/tduck-storage/src/main/java/com/tduck/cloud/storage/cloud/AliyunOssStorageService.java b/tduck-storage/src/main/java/com/tduck/cloud/storage/cloud/AliyunOssStorageService.java
index db1a7e4..5c7199b 100644
--- a/tduck-storage/src/main/java/com/tduck/cloud/storage/cloud/AliyunOssStorageService.java
+++ b/tduck-storage/src/main/java/com/tduck/cloud/storage/cloud/AliyunOssStorageService.java
@@ -27,7 +27,9 @@ public class AliyunOssStorageService extends OssStorageService {
 
     private void init() {
         EnvEnum env = EnvEnum.getCurrentEnv();
-        PREFIX_PATH = PREFIX_PATH.concat(env.getCode()).concat(File.separator);
+        if (!PREFIX_PATH.contains(env.getCode())){
+            PREFIX_PATH = PREFIX_PATH.concat(env.getCode()).concat(File.separator);
+        }
         client = new OSSClientBuilder()
                 .build(config.getEndpoint(), config.getAccessKeyId(), config.getAccessKeySecret());
     }