diff --git a/README.md b/README.md
index bbc2d8f..52e759c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,93 @@
-# osschat-milvus
+# ANN Insert Operator: MilvusClient
 
+
+<br />
+
+
+
+## Desription
+
+Insert data into Milvus collections. **Please make sure you have [created Milvus Collection](https://milvus.io/docs/v2.0.x/create_collection.md) before loading the data.**
+
+<br />
+
+
+
+## Code Example
+
+### Example
+
+
+```python
+import towhee
+
+from towhee import ops
+
+p = (
+        towhee.pipe.input('collection_name', 'vec')
+        .map(('collection_name', 'vec'), (), ops.ann_insert.milvus_client(host='127.0.0.1', port='19530'))
+        .output()
+        )
+
+p(vec)
+```
+
+### Load Collection
+
+> Please load the Collection after inserted data.
+
+```python
+collection.load()
+```
+
+<br />
+
+
+
+## Factory Constructor
+
+Create the operator via the following factory method:
+
+***ann_insert.milvus_client(host, port, user= None, password=None, collection_schema=None, index_params=None)***
+
+**Parameters:**
+
+***host:*** *str*
+
+The host for Milvus.
+
+***port:*** *str*
+
+The port for Milvus.
+
+***user:*** *str*
+
+The user for Zilliz Cloud, defaults to None.
+
+***password:*** *str*
+
+The password for Zilliz Cloud, defaults to None.
+
+
+
+<br />
+
+
+
+## Interface
+
+Insert Milvus data.
+
+**Parameters:**
+
+***collection_name:*** *str*
+
+The collection name for Milvus.
+
+***data:*** *list*
+
+The data to insert into milvus.
+
+**Returns:** MutationResult
+
+A MutationResult object contains `insert_count` represents how many and a `primary_keys` of primary keys.
diff --git a/__init__.py b/__init__.py
new file mode 100644
index 0000000..aa80362
--- /dev/null
+++ b/__init__.py
@@ -0,0 +1,4 @@
+from .milvus_client import MilvusClient
+
+def osschat_milvus(*args, **kwargs):
+    return MilvusClient(*args, **kwargs)
diff --git a/milvus_client.py b/milvus_client.py
new file mode 100644
index 0000000..75a75c8
--- /dev/null
+++ b/milvus_client.py
@@ -0,0 +1,58 @@
+import uuid
+import logging
+from towhee.operator import PyOperator, SharedType
+from pymilvus import connections, Collection
+
+
+logger = logging.getLogger()
+
+
+class MilvusClient(PyOperator):
+    """
+    Milvus ANN index class.
+    """
+
+    def __init__(self, host: str, port: int, user: str = None, password: str = None):
+        self._host = host
+        self._port = port
+        self._connect_name = uuid.uuid4().hex
+        if None in [user, password]:
+            connections.connect(alias=self._connect_name, host=self._host, port=self._port)
+        else:
+            connections.connect(alias=self._connect_name, host=self._host, port=self._port,
+                                user=user, password=password, secure=True)
+
+    def __call__(self, collection_name: str, *data):
+        """
+        Insert one row to Milvus.
+
+        Args:
+        data (`list`):
+            The data to insert into milvus.
+
+        Returns:
+            A MutationResult object contains `insert_count` represents how many and a `primary_keys` of primary keys.
+
+        """
+        self._collection = Collection(collection_name, using=self._connect_name)
+        row = []
+        for item in data:
+            if isinstance(item, list):
+                row.extend([[i] for i in item])
+            else:
+                row.append([item])
+        mr = self._collection.insert(row)
+        if mr.insert_count != len(row[0]):
+            raise RuntimeError("Insert to milvus failed")
+        return mr
+
+    @property
+    def shared_type(self):
+        return SharedType.NotShareable
+
+    # def __del__(self):
+    #     if connections.has_connection(self._connect_name):
+    #         try:
+    #             connections.disconnect(self._connect_name)
+    #         except:
+    #             pass
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..e0472f0
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+pymilvus