diff --git a/server/routers/knowledge_router.py b/server/routers/knowledge_router.py
index cc37319f..7d2313f7 100644
--- a/server/routers/knowledge_router.py
+++ b/server/routers/knowledge_router.py
@@ -723,12 +723,16 @@ async def delete_document(db_id: str, doc_id: str, current_user: User = Depends(
             await knowledge_base.delete_folder(db_id, doc_id)
             return {"message": "文件夹删除成功"}
 
-        file_name = file_meta_info.get("meta", {}).get("filename")
+        file_name = file_meta_info.get("meta", {}).get("path", "").split("/")[-1]
 
         # 尝试从MinIO删除文件，如果失败（例如旧知识库没有MinIO实例），则忽略
         try:
             minio_client = get_minio_client()
             await minio_client.adelete_file(MinIOClient.get_ref_bucket_name(db_id), file_name)
+            # 同时删除 parsed bucket 中的 parsed.md 文件
+            await minio_client.adelete_file(
+                minio_client.KB_BUCKETS["parsed"], f"{db_id}/{doc_id}/parsed.md"
+            )
             logger.debug(f"成功从MinIO删除文件: {file_name}")
         except Exception as minio_error:
             logger.warning(f"从MinIO删除文件失败（可能是旧知识库）: {minio_error}")
diff --git a/src/knowledge/base.py b/src/knowledge/base.py
index c8718a97..849d284c 100644
--- a/src/knowledge/base.py
+++ b/src/knowledge/base.py
@@ -506,9 +506,9 @@ class KnowledgeBase(ABC):
                 minio_client.adelete_objects_by_prefix(minio_client.KB_BUCKETS["parsed"], prefix),
                 minio_client.adelete_objects_by_prefix(minio_client.KB_BUCKETS["documents"], prefix),
                 minio_client.adelete_objects_by_prefix(minio_client.KB_BUCKETS["images"], prefix),
-                # 删除 ref bucket 中的文件（两种命名格式）
-                minio_client.adelete_objects_by_prefix(minio_client.get_ref_bucket_name(db_id), prefix),
-                minio_client.adelete_objects_by_prefix(minio_client.get_ref_bucket_name_full(db_id), prefix),
+                # 直接删除 ref bucket（两种命名格式）
+                minio_client.adelete_bucket(minio_client.get_ref_bucket_name(db_id)),
+                minio_client.adelete_bucket(minio_client.get_ref_bucket_name_full(db_id)),
             )
 
             # 3. 删除数据库记录
diff --git a/src/storage/minio/client.py b/src/storage/minio/client.py
index bb672a65..ecde8595 100644
--- a/src/storage/minio/client.py
+++ b/src/storage/minio/client.py
@@ -283,6 +283,29 @@ class MinIOClient:
         await asyncio.to_thread(_delete_objects)
         return deleted_count
 
+    async def adelete_bucket(self, bucket_name: str) -> bool:
+        """
+        删除 bucket（先删除所有对象，再删除 bucket）
+
+        Args:
+            bucket_name: bucket 名称
+
+        Returns:
+            是否成功
+        """
+        try:
+            # 先删除所有对象
+            await self.adelete_objects_by_prefix(bucket_name, "")
+            # 再删除 bucket
+            await asyncio.to_thread(self.client.remove_bucket, bucket_name)
+            logger.info(f"成功删除 bucket: {bucket_name}")
+            return True
+        except S3Error as e:
+            if "NoSuchBucket" in str(e):
+                logger.warning(f"bucket 不存在: {bucket_name}")
+                return False
+            raise StorageError(f"删除 bucket 失败: {e}")
+
     def file_exists(self, bucket_name: str, object_name: str) -> bool:
         """检查文件是否存在"""
         try: