diff --git a/vectordb_bench/backend/clients/milvus/cli.py b/vectordb_bench/backend/clients/milvus/cli.py
index 24a61566f..b9394cd06 100644
--- a/vectordb_bench/backend/clients/milvus/cli.py
+++ b/vectordb_bench/backend/clients/milvus/cli.py
@@ -29,6 +29,17 @@ class MilvusTypedDict(TypedDict):
         str | None,
         click.option("--password", type=str, help="Db password", required=False),
     ]
+    num_shards: Annotated[
+        int,
+        click.option(
+            "--num-shards",
+            type=int,
+            help="Number of shards",
+            required=False,
+            default=1,
+            show_default=True,
+        ),
+    ]
 
 
 class MilvusAutoIndexTypedDict(CommonTypedDict, MilvusTypedDict): ...
@@ -46,6 +57,7 @@ def MilvusAutoIndex(**parameters: Unpack[MilvusAutoIndexTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=AutoIndexConfig(),
         **parameters,
@@ -64,6 +76,7 @@ def MilvusFlat(**parameters: Unpack[MilvusAutoIndexTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=FLATConfig(),
         **parameters,
@@ -110,6 +123,7 @@ def MilvusIVFFlat(**parameters: Unpack[MilvusIVFFlatTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=IVFFlatConfig(
             nlist=parameters["nlist"],
@@ -131,6 +145,7 @@ def MilvusIVFSQ8(**parameters: Unpack[MilvusIVFFlatTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=IVFSQ8Config(
             nlist=parameters["nlist"],
@@ -156,6 +171,7 @@ def MilvusDISKANN(**parameters: Unpack[MilvusDISKANNTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=DISKANNConfig(
             search_list=parameters["search_list"],
@@ -184,6 +200,7 @@ def MilvusGPUIVFFlat(**parameters: Unpack[MilvusGPUIVFTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=GPUIVFFlatConfig(
             nlist=parameters["nlist"],
@@ -218,6 +235,7 @@ def MilvusGPUBruteForce(**parameters: Unpack[MilvusGPUBruteForceTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=GPUBruteForceConfig(
             metric_type=parameters["metric_type"],
@@ -249,6 +267,7 @@ def MilvusGPUIVFPQ(**parameters: Unpack[MilvusGPUIVFPQTypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=GPUIVFPQConfig(
             nlist=parameters["nlist"],
@@ -288,6 +307,7 @@ def MilvusGPUCAGRA(**parameters: Unpack[MilvusGPUCAGRATypedDict]):
             uri=SecretStr(parameters["uri"]),
             user=parameters["user_name"],
             password=SecretStr(parameters["password"]),
+            num_shards=int(parameters["num_shards"]),
         ),
         db_case_config=GPUCAGRAConfig(
             intermediate_graph_degree=parameters["intermediate_graph_degree"],
diff --git a/vectordb_bench/backend/clients/milvus/config.py b/vectordb_bench/backend/clients/milvus/config.py
index 672becf1b..bf5920817 100644
--- a/vectordb_bench/backend/clients/milvus/config.py
+++ b/vectordb_bench/backend/clients/milvus/config.py
@@ -7,6 +7,7 @@ class MilvusConfig(DBConfig):
     uri: SecretStr = "http://localhost:19530"
     user: str | None = None
     password: SecretStr | None = None
+    num_shards: int = 1
 
     def to_dict(self) -> dict:
         return {
diff --git a/vectordb_bench/backend/clients/milvus/milvus.py b/vectordb_bench/backend/clients/milvus/milvus.py
index 465c51179..7ea7308c5 100644
--- a/vectordb_bench/backend/clients/milvus/milvus.py
+++ b/vectordb_bench/backend/clients/milvus/milvus.py
@@ -40,7 +40,12 @@ def __init__(
 
         from pymilvus import connections
 
-        connections.connect(**self.db_config, timeout=30)
+        connections.connect(
+            uri=self.db_config.get("uri"),
+            user=self.db_config.get("user"),
+            password=self.db_config.get("password"),
+            timeout=30,
+        )
         if drop_old and utility.has_collection(self.collection_name):
             log.info(f"{self.name} client drop_old collection: {self.collection_name}")
             utility.drop_collection(self.collection_name)
@@ -59,6 +64,7 @@ def __init__(
                 name=self.collection_name,
                 schema=CollectionSchema(fields),
                 consistency_level="Session",
+                num_shards=self.db_config.get("num_shards"),
             )
 
             log.info(f"{self.name} create index: index_params: {self.case_config.index_param()}")