diff --git a/milvus_client.py b/milvus_client.py
index e34f514..9a0d394 100644
--- a/milvus_client.py
+++ b/milvus_client.py
@@ -22,7 +22,7 @@ class MilvusClient(PyOperator):
 
     def __call__(self, *data):
         """
-        Insert data to Milvus.
+        Insert one row to Milvus.
 
         Args:
         data (`list`):
@@ -34,7 +34,10 @@ class MilvusClient(PyOperator):
         """
         row = []
         for item in data:
-            row.append([item])
+            if isinstance(item, list):
+                row.extend([[i] for i in item])
+            else:
+                row.append([item])
         mr = self._collection.insert(row)
         if mr.err_count > 0:
             raise RuntimeError("Insert to milvus failed")
@@ -42,7 +45,7 @@ class MilvusClient(PyOperator):
 
     @property
     def shared_type(self):
-        return SharedType.Shareable    
+        return SharedType.Shareable
 
     def __del__(self):
         if connections.has_connection(self._connect_name):