diff --git a/app/utils/milvus_utils.py b/app/utils/milvus_utils.py
index 82306e1..3e3cc28 100644
--- a/app/utils/milvus_utils.py
+++ b/app/utils/milvus_utils.py
@@ -48,8 +48,9 @@ class MilvusService:
       vector_store=vector_store,
       embed_model=self.embeddings,
     )
-    from llama_index.core.node_parser import HierarchicalNodeParser
-    parser = HierarchicalNodeParser.from_defaults(chunk_sizes=[2048, 512, 128])
+    from llama_index.core.node_parser import SimpleNodeParser
+    # parser = HierarchicalNodeParser.from_defaults(chunk_sizes=[2048, 512, 128])
+    parser = SimpleNodeParser()
     # nodes = await parser.aget_nodes_from_documents(documents)
     # 使用同步方法并包装在 asyncio.to_thread 中
     nodes = await asyncio.to_thread(parser.get_nodes_from_documents, documents)