diff --git a/.travis.yml b/.travis.yml
index cee5df18..933f1662 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ install:
 - pip install nose
 - pip install pycodestyle
 - pip install importlib_metadata
-- pip install dicttoxml
+- pip install xmltodict
 - pip install crcmod
 - pip install pycryptodome
 notifications:
diff --git a/qcloud_cos/.travis.yml b/qcloud_cos/.travis.yml
index 51d64fed..23e3daad 100644
--- a/qcloud_cos/.travis.yml
+++ b/qcloud_cos/.travis.yml
@@ -9,7 +9,7 @@ install:
   - pip install six
   - pip install nose
   - pip install pycodestyle
-  - pip install dicttoxml
+  - pip install xmltodict
   - pip install crcmod
 notifications:
   email:
diff --git a/qcloud_cos/cos_client.py b/qcloud_cos/cos_client.py
index 8e3b7cd9..b6a93e49 100644
--- a/qcloud_cos/cos_client.py
+++ b/qcloud_cos/cos_client.py
@@ -17,7 +17,6 @@
 from six.moves.urllib.parse import quote, unquote, urlencode
 from six import text_type, binary_type
 from hashlib import md5
-from dicttoxml import dicttoxml
 from .streambody import StreamBody
 from .xml2dict import Xml2Dict
 from .cos_auth import CosS3Auth
@@ -747,8 +746,7 @@ def delete_objects(self, Bucket, Delete={}, **kwargs):
                 Delete=objects
             )
         """
-        lst = ['<Object>', '</Object>']  # 类型为list的标签
-        xml_config = format_xml(data=Delete, root='Delete', lst=lst)
+        xml_config = format_xml(data=Delete, root='Delete')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -1141,12 +1139,9 @@ def put_object_acl(self, Bucket, Key, AccessControlPolicy={}, **kwargs):
                 GrantRead='id="qcs::cam::uin/123:uin/456",id="qcs::cam::uin/123:uin/123"'
             )
         """
-        lst = [  # 类型为list的标签
-            '<Grant>',
-            '</Grant>']
         xml_config = ""
         if AccessControlPolicy:
-            xml_config = format_xml(data=AccessControlPolicy, root='AccessControlPolicy', lst=lst)
+            xml_config = format_xml(data=AccessControlPolicy, root='AccessControlPolicy')
         headers = mapped(kwargs)
         params = {'acl': ''}
         url = self._conf.uri(bucket=Bucket, path=Key)
@@ -1610,12 +1605,9 @@ def put_bucket_acl(self, Bucket, AccessControlPolicy={}, **kwargs):
                 GrantRead='id="qcs::cam::uin/123:uin/456",id="qcs::cam::uin/123:uin/123"'
             )
         """
-        lst = [  # 类型为list的标签
-            '<Grant>',
-            '</Grant>']
         xml_config = ""
         if AccessControlPolicy:
-            xml_config = format_xml(data=AccessControlPolicy, root='AccessControlPolicy', lst=lst)
+            xml_config = format_xml(data=AccessControlPolicy, root='AccessControlPolicy')
         headers = mapped(kwargs)
         params = {'acl': ''}
         url = self._conf.uri(bucket=Bucket)
@@ -1699,18 +1691,7 @@ def put_bucket_cors(self, Bucket, CORSConfiguration={}, **kwargs):
                 CORSConfiguration=cors_config
             )
         """
-        lst = [  # 类型为list的标签
-            '<CORSRule>',
-            '<AllowedOrigin>',
-            '<AllowedMethod>',
-            '<AllowedHeader>',
-            '<ExposeHeader>',
-            '</CORSRule>',
-            '</AllowedOrigin>',
-            '</AllowedMethod>',
-            '</AllowedHeader>',
-            '</ExposeHeader>']
-        xml_config = format_xml(data=CORSConfiguration, root='CORSConfiguration', lst=lst)
+        xml_config = format_xml(data=CORSConfiguration, root='CORSConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -1833,17 +1814,7 @@ def put_bucket_lifecycle(self, Bucket, LifecycleConfiguration={}, **kwargs):
             )
         """
         # 类型为list的标签
-        lst = [
-            '<Rule>',
-            '<Tag>',
-            '<Transition>',
-            '<NoncurrentVersionTransition>',
-            '</NoncurrentVersionTransition>',
-            '</Transition>',
-            '</Tag>',
-            '</Rule>'
-        ]
-        xml_config = format_xml(data=LifecycleConfiguration, root='LifecycleConfiguration', lst=lst)
+        xml_config = format_xml(data=LifecycleConfiguration, root='LifecycleConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2068,8 +2039,7 @@ def put_bucket_replication(self, Bucket, ReplicationConfiguration={}, **kwargs):
                 ReplicationConfiguration=replication_config
             )
         """
-        lst = ['<Rule>', '</Rule>']  # 类型为list的标签
-        xml_config = format_xml(data=ReplicationConfiguration, root='ReplicationConfiguration', lst=lst)
+        xml_config = format_xml(data=ReplicationConfiguration, root='ReplicationConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2197,7 +2167,12 @@ def put_bucket_website(self, Bucket, WebsiteConfiguration={}, **kwargs):
                 WebsiteConfiguration=website_config
             )
         """
-        xml_config = format_xml(data=WebsiteConfiguration, root='WebsiteConfiguration', parent_child=True)
+        # 重构 WebsiteConfiguration['RoutingRules']
+        WebsiteConfigurationCpy = copy.deepcopy(WebsiteConfiguration)
+        if 'RoutingRules' in WebsiteConfigurationCpy.keys():
+            WebsiteConfigurationCpy['RoutingRules'] = {'RoutingRule': WebsiteConfigurationCpy['RoutingRules']}
+
+        xml_config = format_xml(data=WebsiteConfigurationCpy, root='WebsiteConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2496,8 +2471,7 @@ def put_bucket_domain(self, Bucket, DomainConfiguration={}, **kwargs):
                 DomainConfiguration=domain_config
             )
         """
-        lst = ['<DomainRule>', '</DomainRule>']  # 类型为list的标签
-        xml_config = format_xml(data=DomainConfiguration, root='DomainConfiguration', lst=lst)
+        xml_config = format_xml(data=DomainConfiguration, root='DomainConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2600,8 +2574,7 @@ def put_bucket_domain_certificate(self, Bucket, DomainCertificateConfiguration,
                 DomainCertificateConfiguration=domain_cert_config
             )
         """
-        lst = ['<DomainList>', '</DomainList>']  # 类型为list的标签
-        xml_config = format_xml(data=DomainCertificateConfiguration, root='DomainCertificate', lst=lst)
+        xml_config = format_xml(data=DomainCertificateConfiguration, root='DomainCertificate')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2714,8 +2687,7 @@ def put_bucket_origin(self, Bucket, OriginConfiguration={}, **kwargs):
                 OriginConfiguration=origin_config
             )
         """
-        lst = ['<OriginRule>', '</OriginRule>']  # 类型为list的标签
-        xml_config = format_xml(data=OriginConfiguration, root='OriginConfiguration', lst=lst)
+        xml_config = format_xml(data=OriginConfiguration, root='OriginConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2848,9 +2820,8 @@ def put_bucket_inventory(self, Bucket, Id, InventoryConfiguration={}, **kwargs):
                 InventoryConfiguration=inventory_config
             )
         """
-        lst = ['<Field>', '</Field>']  # 类型为list的标签
         InventoryConfiguration['Id'] = Id
-        xml_config = format_xml(data=InventoryConfiguration, root='InventoryConfiguration', lst=lst)
+        xml_config = format_xml(data=InventoryConfiguration, root='InventoryConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -2965,8 +2936,7 @@ def put_object_tagging(self, Bucket, Key, Tagging={}, **kwargs):
                 Tagging=tagging_set
             )
         """
-        lst = ['<Tag>', '</Tag>']  # 类型为list的标签
-        xml_config = format_xml(data=Tagging, root='Tagging', lst=lst)
+        xml_config = format_xml(data=Tagging, root='Tagging')
         headers = mapped(kwargs)
         params = {'tagging': ''}
         if 'versionId' in headers:
@@ -3089,8 +3059,7 @@ def put_bucket_tagging(self, Bucket, Tagging={}, **kwargs):
                 Tagging=tagging_set
             )
         """
-        lst = ['<Tag>', '</Tag>']  # 类型为list的标签
-        xml_config = format_xml(data=Tagging, root='Tagging', lst=lst)
+        xml_config = format_xml(data=Tagging, root='Tagging')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -3203,8 +3172,7 @@ def put_bucket_referer(self, Bucket, RefererConfiguration={}, **kwargs):
                 RefererConfiguration=referer_config
             )
         """
-        lst = ['<Domain>', '</Domain>']  # 类型为list的标签
-        xml_config = format_xml(data=RefererConfiguration, root='RefererConfiguration', lst=lst)
+        xml_config = format_xml(data=RefererConfiguration, root='RefererConfiguration')
         headers = mapped(kwargs)
         headers['Content-MD5'] = get_md5(xml_config)
         headers['Content-Type'] = 'application/xml'
@@ -4059,13 +4027,7 @@ def put_bucket_encryption(self, Bucket, ServerSideEncryptionConfiguration={}, **
         :param kwargs(dict): 设置请求的headers.
         :return: None.
         """
-        # 类型为list的标签
-        lst = [
-            '<Rule>',
-            '</Rule>'
-        ]
-        xml_config = format_xml(data=ServerSideEncryptionConfiguration, root='ServerSideEncryptionConfiguration',
-                                lst=lst)
+        xml_config = format_xml(data=ServerSideEncryptionConfiguration, root='ServerSideEncryptionConfiguration')
         headers = mapped(kwargs)
         params = {'encryption': ''}
         url = self._conf.uri(bucket=Bucket)
@@ -6012,21 +5974,7 @@ def ci_auditing_image_batch(self, Bucket, Input, DetectType=None, BizType=None,
             'Conf': conf
         }
 
-        lst = [  # 类型为list的标签
-            '<Input>',
-            '<Object>',
-            '<Url>',
-            '<Interval>',
-            '<MaxFrames>',
-            '<DataId>',
-            '</Input>',
-            '</Object>',
-            '</Url>',
-            '</Interval>',
-            '</MaxFrames>',
-            '</DataId>']
-
-        xml_request = format_xml(data=request, root='Request', lst=lst)
+        xml_request = format_xml(data=request, root='Request')
         headers['Content-Type'] = 'application/xml'
 
         path = 'image/auditing'
@@ -6586,7 +6534,7 @@ def ci_create_media_jobs(self, Bucket, Jobs={}, Lst={}, **kwargs):
 
         :param Bucket(string): 存储桶名称.
         :param Jobs(dict): 创建任务的配置.
-        :param Lst(dict): 创建任务dict转xml时去除Key数组.
+        :param Lst(dict): 创建任务dict转xml时去除Key数组. TODO 替换成 xmltodict 库后可以将 Lst 参数去掉
         :param kwargs(dict): 设置请求的headers.
         :return(dict): 查询成功返回的结果,dict类型.
 
@@ -6613,7 +6561,7 @@ def ci_create_media_jobs(self, Bucket, Jobs={}, Lst={}, **kwargs):
         headers = final_headers
 
         params = format_values(params)
-        xml_config = format_xml(data=Jobs, root='Request', lst=Lst)
+        xml_config = format_xml(data=Jobs, root='Request')
         path = "/jobs"
         url = self._conf.uri(bucket=Bucket, path=path, endpoint=self._conf._endpoint_ci)
         logger.info("create_media_jobs result, url=:{url} ,headers=:{headers}, params=:{params}, xml_config=:{xml_config}".format(
@@ -6640,7 +6588,7 @@ def ci_create_media_pic_jobs(self, Bucket, Jobs={}, Lst={}, **kwargs):
 
         :param Bucket(string): 存储桶名称.
         :param Jobs(dict): 创建任务的配置.
-        :param Lst(dict): 创建任务dict转xml时去除Key数组.
+        :param Lst(dict): 创建任务dict转xml时去除Key数组. TODO 替换为 xmltodict 库后可以将 Lst 参数去掉
         :param kwargs(dict): 设置请求的headers.
         :return(dict): 查询成功返回的结果,dict类型.
 
@@ -6667,7 +6615,7 @@ def ci_create_media_pic_jobs(self, Bucket, Jobs={}, Lst={}, **kwargs):
         headers = final_headers
 
         params = format_values(params)
-        xml_config = format_xml(data=Jobs, root='Request', lst=Lst)
+        xml_config = format_xml(data=Jobs, root='Request')
         path = "/pic_jobs"
         url = self._conf.uri(bucket=Bucket, path=path, endpoint=self._conf._endpoint_ci)
         logger.info("create_media_pic_jobs result, url=:{url} ,headers=:{headers}, params=:{params}, xml_config=:{xml_config}".format(
diff --git a/qcloud_cos/cos_comm.py b/qcloud_cos/cos_comm.py
index 4d2ad6dc..c758d4bd 100644
--- a/qcloud_cos/cos_comm.py
+++ b/qcloud_cos/cos_comm.py
@@ -12,7 +12,7 @@
 import xml.dom.minidom
 import xml.etree.ElementTree
 from datetime import datetime
-from dicttoxml import dicttoxml
+from xmltodict import unparse
 from .xml2dict import Xml2Dict
 from .cos_exception import CosClientError
 from .cos_exception import CosServiceError
@@ -202,14 +202,21 @@ def mapped(headers):
     return _headers
 
 
-def format_xml(data, root, lst=list(), parent_child=False):
+# def format_xml(data, root, lst=list(), parent_child=False):
+#     """将dict转换为xml, xml_config是一个bytes"""
+#     if parent_child:
+#         xml_config = dicttoxml(data, item_func=lambda x: x[:-2], custom_root=root, attr_type=False)
+#     else:
+#         xml_config = dicttoxml(data, item_func=lambda x: x, custom_root=root, attr_type=False)
+#     for i in lst:
+#         xml_config = xml_config.replace(to_bytes(i + i), to_bytes(i))
+#     return xml_config
+
+
+def format_xml(data, root):
     """将dict转换为xml, xml_config是一个bytes"""
-    if parent_child:
-        xml_config = dicttoxml(data, item_func=lambda x: x[:-1], custom_root=root, attr_type=False)
-    else:
-        xml_config = dicttoxml(data, item_func=lambda x: x, custom_root=root, attr_type=False)
-    for i in lst:
-        xml_config = xml_config.replace(to_bytes(i + i), to_bytes(i))
+    input_dict = {root: data}
+    xml_config = unparse(input_dict=input_dict).encode('utf-8')
     return xml_config
 
 
diff --git a/requirements.txt b/requirements.txt
index 50d0098c..e7cdece1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-dicttoxml
+xmltodict
 six
 crcmod
 pycryptodome
\ No newline at end of file
diff --git a/ut/test.py b/ut/test.py
index ee5b433b..20ff6343 100644
--- a/ut/test.py
+++ b/ut/test.py
@@ -514,7 +514,7 @@ def test_put_get_delete_cors():
     )
     assert response
     # delete cors
-    response = client.get_bucket_cors(
+    response = client.delete_bucket_cors(
         Bucket=test_bucket
     )
 
@@ -2254,57 +2254,85 @@ def test_sse_c_file():
 if __name__ == "__main__":
     setUp()
     """
-    test_put_object_enable_md5()
-    test_upload_with_server_side_encryption()
-    test_upload_empty_file()
     test_put_get_delete_object_10MB()
+    test_put_object_speacil_names()
+    test_get_object_special_names()
+    test_delete_object_special_names()
+    test_put_object_non_exist_bucket()
+    test_put_object_acl()
+    test_get_object_acl()
+    test_copy_object_diff_bucket()
+    test_create_abort_multipart_upload()
+    test_create_complete_multipart_upload()
+    test_upload_part_copy()
+    test_delete_multiple_objects()
+    test_create_head_delete_bucket()
+    test_create_head_delete_maz_bucket()
+    test_put_bucket_acl_illegal()
+    test_get_bucket_acl_normal()
+    test_list_objects()
+    test_list_objects_versions()
+    test_get_presigned_url()
+    test_get_bucket_location()
+    test_get_service()
+    test_put_get_delete_cors()
+    test_put_get_delete_lifecycle()
     test_put_get_versioning()
     test_put_get_delete_replication()
-    test_upload_part_copy()
+    test_put_get_delete_website()
+    test_list_multipart_uploads()
+    test_upload_file_from_buffer()
     test_upload_file_multithreading()
     test_upload_file_with_progress_callback()
     test_copy_file_automatically()
-    test_copy_10G_file_in_same_region()
-    test_list_objects()
+    test_upload_empty_file()
     test_use_get_auth()
+    test_upload_with_server_side_encryption()
     test_put_get_bucket_logging()
-    test_put_get_delete_website()
-    test_put_get_bucket_policy()
+    test_put_object_enable_md5()
+    test_put_object_from_local_file()
+    test_object_exists()
+    test_bucket_exists()
+    test_put_get_delete_bucket_policy()
     test_put_file_like_object()
     test_put_chunked_object()
+    test_put_get_gzip_file()
+    test_put_get_delete_bucket_domain()
+    test_put_get_delete_bucket_domain_certificate()
     test_put_get_delete_bucket_inventory()
+    test_put_get_delete_bucket_tagging()
+    test_put_get_delete_object_tagging()
+    test_put_get_delete_bucket_referer()
     test_put_get_traffic_limit()
-    test_put_get_delete_bucket_domain()
     test_select_object()
-    _test_get_object_sensitive_content_recognition()
-    test_live_channel()
     test_download_file()
-    test_put_get_bucket_intelligenttiering()
+    test_bucket_encryption()
     test_aes_client()
     test_rsa_client()
-    test_qrcode()
+    test_live_channel()
+    test_get_object_url()
+    test_ci_put_image_style()
+    test_ci_get_image_style()
+    test_ci_get_image_info()
+    test_ci_get_image_exif_info()
+    test_ci_get_image_ave_info()
+    test_ci_image_assess_quality()
+    test_ci_qrcode_generate()
+    test_ci_ocr_process()
     test_ci_get_media_queue()
+    test_ci_get_media_pic_queue()
     test_ci_create_media_transcode_watermark_jobs()
     test_ci_create_media_transcode_jobs()
+    test_ci_create_media_pic_jobs()
+    test_ci_list_media_pic_jobs()
     test_ci_list_media_transcode_jobs()
-    test_ci_create_doc_transcode_jobs()
-    test_ci_list_doc_transcode_jobs()
-    test_ci_live_video_auditing()
     test_get_media_info()
     test_get_snapshot()
     test_get_pm3u8()
     test_ci_get_media_bucket()
+    test_ci_create_doc_transcode_jobs()
+    test_ci_list_doc_transcode_jobs()
+    test_ci_live_video_auditing()
     test_sse_c_file()
-    test_ci_list_media_pic_jobs()
-    test_ci_create_media_pic_jobs()
-    test_ci_get_media_pic_queue()
-    test_ci_put_image_style()
-    test_ci_get_image_style()
-    test_ci_get_image_info()
-    test_ci_get_image_exif_info()
-    test_ci_get_image_ave_info()
-    test_ci_qrcode_generate()
-    test_ci_image_assess_quality()
-    test_ci_ocr_process()
     """
     tearDown()