diff --git a/qcloud_cos/cos_client.py b/qcloud_cos/cos_client.py
index cdb30e15..05de4adf 100644
--- a/qcloud_cos/cos_client.py
+++ b/qcloud_cos/cos_client.py
@@ -2266,8 +2266,6 @@ def upload_file(self, Bucket, Key, LocalFilePath, PartSize=1, MAXThread=5, Enabl
                 LocalFilePath=file_name,
                 PartSize=10,
                 MAXThread=10,
-                CacheControl='no-cache',
-                ContentDisposition='download.txt'
             )
         """
         file_size = os.path.getsize(LocalFilePath)
diff --git a/qcloud_cos/cos_comm.py b/qcloud_cos/cos_comm.py
index 388730e7..6e48353b 100644
--- a/qcloud_cos/cos_comm.py
+++ b/qcloud_cos/cos_comm.py
@@ -98,7 +98,7 @@ def get_md5(data):
 
 def get_content_md5(body):
     """计算任何输入流的md5值"""
-    if isinstance(body, string_types):
+    if isinstance(body, text_type) or isinstance(body, binary_type):
         return get_md5(body)
     elif hasattr(body, 'tell') and hasattr(body, 'seek') and hasattr(body, 'read'):
         file_position = body.tell()  # 记录文件当前位置
@@ -359,7 +359,7 @@ def get_file_like_object_length(data):
 def check_object_content_length(data):
     """put_object接口和upload_part接口的文件大小不允许超过5G"""
     content_len = 0
-    if type(data) is string_types:
+    if isinstance(data, text_type) or isinstance(data, binary_type):
         content_len = len(to_bytes(data))
     elif hasattr(data, 'fileno') and hasattr(data, 'tell'):
         content_len = get_file_like_object_length(data)
diff --git a/ut/test.py b/ut/test.py
index 241be7b4..47f69639 100644
--- a/ut/test.py
+++ b/ut/test.py
@@ -651,8 +651,7 @@ def test_upload_file_multithreading():
         Key=file_name,
         LocalFilePath=file_name,
         MAXThread=10,
-        CacheControl='no-cache',
-        ContentDisposition='download.txt'
+        EnableMD5=True
     )
     ed = time.time()  # 记录结束时间
     if os.path.exists(file_name):