diff --git a/pilot/vector_store/milvus_store.py b/pilot/vector_store/milvus_store.py
index 8c680b375..dea33e61d 100644
--- a/pilot/vector_store/milvus_store.py
+++ b/pilot/vector_store/milvus_store.py
@@ -1,7 +1,7 @@
 from typing import Any, Iterable, List, Optional, Tuple
 
 from langchain.docstore.document import Document
-from pymilvus import Collection, DataType, connections
+from pymilvus import Collection, DataType, connections, utility
 
 from pilot.configs.config import Config
 from pilot.vector_store.vector_store_base import VectorStoreBase
@@ -29,6 +29,8 @@ class MilvusStore(VectorStoreBase):
         self.secure = ctx.get("secure", None)
         self.embedding = ctx.get("embeddings", None)
         self.fields = []
+        self.alias = "default"
+
 
         # use HNSW by default.
         self.index_params = {
@@ -48,7 +50,9 @@ class MilvusStore(VectorStoreBase):
             "IVF_HNSW": {"params": {"nprobe": 10, "ef": 10}},
             "ANNOY": {"params": {"search_k": 10}},
         }
-
+        # default collection schema
+        self.primary_field = "pk_id"
+        self.vector_field = "vector"
         self.text_field = "content"
 
         if (self.username is None) != (self.password is None):
@@ -98,42 +102,30 @@ class MilvusStore(VectorStoreBase):
         texts = [d.page_content for d in documents]
         metadatas = [d.metadata for d in documents]
         embeddings = self.embedding.embed_query(texts[0])
+
+        if utility.has_collection(self.collection_name):
+            self.col = Collection(
+                self.collection_name, using=self.alias
+            )
+            for x in self.col.schema.fields:
+                self.fields.append(x.name)
+                if x.auto_id:
+                    self.fields.remove(x.name)
+                if x.is_primary:
+                    self.primary_field = x.name
+                if x.dtype == DataType.FLOAT_VECTOR or x.dtype == DataType.BINARY_VECTOR:
+                    self.vector_field = x.name
+            self._add_documents(texts, metadatas)
+            return self.collection_name
+
         dim = len(embeddings)
         # Generate unique names
-        primary_field = "pk_id"
-        vector_field = "vector"
-        text_field = "content"
-        self.text_field = text_field
+        primary_field = self.primary_field
+        vector_field = self.vector_field
+        text_field = self.text_field
+        # self.text_field = text_field
         collection_name = vector_name
         fields = []
-        # Determine metadata schema
-        # if metadatas:
-        #     # Check if all metadata keys line up
-        #     key = metadatas[0].keys()
-        #     for x in metadatas:
-        #         if key != x.keys():
-        #             raise ValueError(
-        #                 "Mismatched metadata. "
-        #                 "Make sure all metadata has the same keys and datatype."
-        #             )
-        #     # Create FieldSchema for each entry in singular metadata.
-        #     for key, value in metadatas[0].items():
-        #         # Infer the corresponding datatype of the metadata
-        #         dtype = infer_dtype_bydata(value)
-        #         if dtype == DataType.UNKNOWN:
-        #             raise ValueError(f"Unrecognized datatype for {key}.")
-        #         elif dtype == DataType.VARCHAR:
-        #             # Find out max length text based metadata
-        #             max_length = 0
-        #             for subvalues in metadatas:
-        #                 max_length = max(max_length, len(subvalues[key]))
-        #             fields.append(
-        #                 FieldSchema(key, DataType.VARCHAR, max_length=max_length + 1)
-        #             )
-        #         else:
-        #             fields.append(FieldSchema(key, dtype))
-
-        # Find out max length of texts
         max_length = 0
         for y in texts:
             max_length = max(max_length, len(y))
@@ -147,7 +139,6 @@ class MilvusStore(VectorStoreBase):
         )
         # vector field
         fields.append(FieldSchema(vector_field, DataType.FLOAT_VECTOR, dim=dim))
-        # milvus the schema for the collection
         schema = CollectionSchema(fields)
         # Create the collection
         collection = Collection(collection_name, schema)
@@ -165,7 +156,7 @@ class MilvusStore(VectorStoreBase):
                 self.primary_field = x.name
             if x.dtype == DataType.FLOAT_VECTOR or x.dtype == DataType.BINARY_VECTOR:
                 self.vector_field = x.name
-        self._add_texts(texts, metadatas)
+        self._add_documents(texts, metadatas)
 
         return self.collection_name
 
@@ -224,7 +215,7 @@ class MilvusStore(VectorStoreBase):
     #     )
     #     return _text
 
-    def _add_texts(
+    def _add_documents(
         self,
         texts: Iterable[str],
         metadatas: Optional[List[dict]] = None,
@@ -320,3 +311,6 @@ class MilvusStore(VectorStoreBase):
             )
 
         return data[0], ret
+
+    def close(self):
+        connections.disconnect()
\ No newline at end of file