diff --git a/rag/folderinfo.py b/rag/folderinfo.py
index 80eadd6..d075e99 100644
--- a/rag/folderinfo.py
+++ b/rag/folderinfo.py
@@ -131,7 +131,9 @@ where a.orgid = b.orgid
 		fiid = ns.get('fiid', '')
 		id = ns.get('id', '')
 		orgid = ns.get('ownerid', '')
+		hashvalue = ns.get('hashvalue', '')
 		db_type = ''
+
 		api_service = APIService()
 		debug(
 			f'Inserting document: file_path={realpath}, userid={orgid}, db_type={db_type}, knowledge_base_id={fiid}, document_id={id}')
@@ -147,6 +149,28 @@ where a.orgid = b.orgid
 			if not os.path.exists(realpath):
 				raise ValueError(f"文件 {realpath} 不存在")
 
+			# 检查 hashvalue 是否已存在
+			db = DBPools()
+			dbname = "kyrag"
+			sql_check_hash = """
+						SELECT hashvalue 
+						FROM file 
+						WHERE hashvalue = ${hashvalue}$
+					"""
+			async with db.sqlorContext(dbname) as sor:
+				hash_result = await sor.sqlExe(sql_check_hash, {"hashvalue": hashvalue})
+				if hash_result:
+					debug(f"文件已存在: hashvalue={hashvalue}")
+					timings["total"] = time.time() - start_total
+					return {
+						"status": "error",
+						"document_id": id,
+						"collection_name": "ragdb",
+						"timings": timings,
+						"message": f"文件已存在: hashvalue={hashvalue}",
+						"status_code": 400
+					}
+
 			# 获取服务参数
 			service_params = await self.get_service_params(orgid)
 			if not service_params: