diff --git a/baidubce/auth/bce_v1_signer.py b/baidubce/auth/bce_v1_signer.py
index 35c45579..62937e85 100644
--- a/baidubce/auth/bce_v1_signer.py
+++ b/baidubce/auth/bce_v1_signer.py
@@ -13,7 +13,6 @@
 """
 This module provides authentication functions for bce services.
 """
-from __future__ import absolute_import
 import hashlib
 import hmac
 import logging
diff --git a/baidubce/bce_base_client.py b/baidubce/bce_base_client.py
index 6905d0ff..02976da4 100644
--- a/baidubce/bce_base_client.py
+++ b/baidubce/bce_base_client.py
@@ -13,9 +13,7 @@
 """
 This module provide base class for BCE service clients.
 """
-from __future__ import absolute_import
 import copy
-from builtins import str, bytes
 
 import baidubce
 from baidubce import bce_client_configuration
diff --git a/baidubce/bce_client_configuration.py b/baidubce/bce_client_configuration.py
index 8d4d834b..c3e01d3c 100644
--- a/baidubce/bce_client_configuration.py
+++ b/baidubce/bce_client_configuration.py
@@ -14,9 +14,6 @@
 This module defines a common configuration class for BCE.
 """
 
-from future.utils import iteritems
-from builtins import str
-from builtins import bytes
 import baidubce.protocol
 import baidubce.region
 from baidubce.retry.retry_policy import BackOffRetryPolicy
@@ -70,7 +67,7 @@ def merge_non_none_values(self, other):
         :param other:
         :return:
         """
-        for k, v in iteritems(other.__dict__):
+        for k, v in other.__dict__.items():
             if v is not None:
                 self.__dict__[k] = v
 
diff --git a/baidubce/bce_response.py b/baidubce/bce_response.py
index d55447b0..1db49dd3 100644
--- a/baidubce/bce_response.py
+++ b/baidubce/bce_response.py
@@ -13,9 +13,6 @@
 """
 This module provides a general response class for BCE services.
 """
-from future.utils import iteritems
-from builtins import str
-from builtins import bytes
 from baidubce import utils
 from baidubce import compat
 from baidubce.http import http_headers
@@ -34,7 +31,7 @@ def set_metadata_from_headers(self, headers):
         :param headers:
         :return:
         """
-        for k, v in iteritems(headers):
+        for k, v in headers.items():
             if k.startswith(compat.convert_to_string(http_headers.BCE_PREFIX)):
                 k = 'bce_' + k[len(compat.convert_to_string(http_headers.BCE_PREFIX)):]
             k = utils.pythonize_name(k.replace('-', '_'))
@@ -48,7 +45,7 @@ def set_metadata_from_headers_no_underlined(self, headers):
         :param headers:
         :return:
         """
-        for k, v in iteritems(headers):
+        for k, v in headers.items():
             if k.lower() == compat.convert_to_string(http_headers.ETAG.lower()):
                 v = v.strip('"')
             setattr(self.metadata, k, v)
diff --git a/baidubce/http/bce_http_client.py b/baidubce/http/bce_http_client.py
index 7c5e4bf8..fb1e881b 100644
--- a/baidubce/http/bce_http_client.py
+++ b/baidubce/http/bce_http_client.py
@@ -13,8 +13,6 @@
 """
 This module provide http request function for bce services.
 """
-from future.utils import iteritems, iterkeys, itervalues
-from builtins import str, bytes
 import logging
 import http.client
 import sys
@@ -77,7 +75,7 @@ def _send_http_request(conn, http_method, uri, headers, body, send_buf_size):
     uri = compat.convert_to_string(uri)
     conn.putrequest(http_method, uri, skip_host=True, skip_accept_encoding=True)
 
-    for k, v in iteritems(headers):
+    for k, v in headers.items():
         k = utils.convert_to_standard_string(k)
         v = utils.convert_to_standard_string(v)
         conn.putheader(k, v)
@@ -110,7 +108,7 @@ def check_headers(headers):
     :param headers:
     :return:
     """
-    for k, v in iteritems(headers):
+    for k, v in headers.items():
         if isinstance(v, (bytes, str)) and \
                 b'\n' in compat.convert_to_bytes(v):
             raise BceClientError(r'There should not be any "\n" in header[%s]:%s' % (k, v))
diff --git a/baidubce/services/bcc/bcc_client.py b/baidubce/services/bcc/bcc_client.py
index fd093563..66ffa9ce 100644
--- a/baidubce/services/bcc/bcc_client.py
+++ b/baidubce/services/bcc/bcc_client.py
@@ -15,8 +15,6 @@
 This module provides a client class for BCC.
 """
 
-from __future__ import unicode_literals
-
 import copy
 import json
 import logging
diff --git a/baidubce/services/bos/bos_client.py b/baidubce/services/bos/bos_client.py
index f7591142..c5bbc0b2 100644
--- a/baidubce/services/bos/bos_client.py
+++ b/baidubce/services/bos/bos_client.py
@@ -22,9 +22,6 @@
 import logging
 import shutil
 import struct
-from builtins import str
-from builtins import bytes
-from future.utils import iteritems, iterkeys, itervalues
 from concurrent.futures import ThreadPoolExecutor, wait, ALL_COMPLETED, FIRST_COMPLETED
 import threading
 import functools
@@ -174,7 +171,7 @@ def get_bucket_acl(self, bucket_name, config=None):
     @staticmethod
     def _dump_acl_object(acl):
         result = {}
-        for k, v in iteritems(acl.__dict__):
+        for k, v in acl.__dict__.items():
             if not k.startswith('_'):
                 result[k] = v
         return result
@@ -2851,7 +2848,7 @@ def _prepare_object_headers(
             meta_data_set = set()
             if not isinstance(user_metadata, dict):
                 raise TypeError('user_metadata should be of type dict.')
-            for k, v in iteritems(user_metadata):
+            for k, v in user_metadata.items():
                 meta_data_set.add(k.lower())
                 k = utils.convert_to_standard_string(k)
                 v = utils.convert_to_standard_string(v)
@@ -2911,7 +2908,7 @@ def _get_user_header(headers, user_headers, is_copy=False):
                                     http_headers.BCE_COPY_SOURCE_IF_UNMODIFIED_SINCE,
                                     http_headers.BCE_COPY_SOURCE_IF_MODIFIED_SINCE]))
 
-        for k, v in iteritems(user_headers):
+        for k, v in user_headers.items():
             k = utils.convert_to_standard_string(k)
             if k != http_headers.BOS_OBJECT_EXPIRES:
                 v = utils.convert_to_standard_string(v)
diff --git a/baidubce/services/cert/cert_client.py b/baidubce/services/cert/cert_client.py
index 9b005b43..1cfe55fd 100644
--- a/baidubce/services/cert/cert_client.py
+++ b/baidubce/services/cert/cert_client.py
@@ -14,8 +14,6 @@
 This module provides a client class for CERT.
 """
 
-from __future__ import unicode_literals
-
 import copy
 import json
 import logging
diff --git a/baidubce/services/esg/esg_client.py b/baidubce/services/esg/esg_client.py
index e0827f42..fcedd7ed 100644
--- a/baidubce/services/esg/esg_client.py
+++ b/baidubce/services/esg/esg_client.py
@@ -13,7 +13,6 @@
 """
 This module provides a client class for esg.
 """
-from __future__ import unicode_literals
 
 import copy
 import json
diff --git a/baidubce/services/iam/iam_client.py b/baidubce/services/iam/iam_client.py
index ee804ca7..d2ce54ec 100644
--- a/baidubce/services/iam/iam_client.py
+++ b/baidubce/services/iam/iam_client.py
@@ -18,8 +18,6 @@
 import json
 import logging
 
-from future.utils import iteritems
-
 from baidubce.auth import bce_v1_signer
 from baidubce.bce_base_client import BceBaseClient
 from baidubce.http import bce_http_client
diff --git a/baidubce/services/rds/rds_client.py b/baidubce/services/rds/rds_client.py
index 71e058b6..a055986e 100644
--- a/baidubce/services/rds/rds_client.py
+++ b/baidubce/services/rds/rds_client.py
@@ -14,8 +14,6 @@
 This module provides a client class for RDS.
 """
 
-from __future__ import unicode_literals
-
 import copy
 import json
 import logging
diff --git a/baidubce/services/scs/scs_client.py b/baidubce/services/scs/scs_client.py
index c4c1631a..c20d5937 100644
--- a/baidubce/services/scs/scs_client.py
+++ b/baidubce/services/scs/scs_client.py
@@ -16,7 +16,6 @@
 """
 This module provides a client class for SCS.
 """
-from __future__ import unicode_literals
 
 import copy
 import json
diff --git a/baidubce/services/sts/sts_client.py b/baidubce/services/sts/sts_client.py
index 9aba0e3e..22ee710b 100644
--- a/baidubce/services/sts/sts_client.py
+++ b/baidubce/services/sts/sts_client.py
@@ -14,7 +14,6 @@
 This module provides a client for STS.
 """
 
-from future.utils import iteritems
 import copy
 import http.client
 import os
@@ -94,7 +93,7 @@ def get_session_token(self, acl, duration_seconds=None):
     @staticmethod
     def _dump_acl_object(acl):
         result = {}
-        for k, v in iteritems(acl.__dict__):
+        for k, v in acl.__dict__.items():
             if not k.startswith('_'):
                 result[k] = v
         return result
diff --git a/baidubce/utils.py b/baidubce/utils.py
index 1318bbff..3295abf4 100644
--- a/baidubce/utils.py
+++ b/baidubce/utils.py
@@ -13,11 +13,6 @@
 """
 This module provide some tools for bce client.
 """
-# str() generator unicode,bytes() for ASCII
-from __future__ import print_function
-from __future__ import absolute_import
-from builtins import str, bytes
-from future.utils import iteritems, iterkeys, itervalues
 from baidubce import compat
 
 import os
@@ -175,7 +170,7 @@ def safe_get_element(name, container):
     :return:
         **Value**
     """
-    for k, v in iteritems(container):
+    for k, v in container.items():
         if k.strip().lower() == name.strip().lower():
             return v
     return ""
@@ -320,7 +315,7 @@ def guess_content_type_by_file_name(file_name):
         file_name = compat.convert_to_string(file_name)
         name = os.path.basename(file_name.lower())
         suffix = name.split('.')[-1]
-        if suffix in iterkeys(mime_map):
+        if suffix in mime_map.keys():
             mime_type = mime_map[suffix]
         else:
             import mimetypes
@@ -368,7 +363,7 @@ def get_canonical_querystring(params, for_signature):
     if params is None:
         return ''
     result = []
-    for k, v in iteritems(params):
+    for k, v in params.items():
         if not for_signature or k.lower != http_headers.AUTHORIZATION.lower():
             if v is None:
                 v = ''
@@ -384,7 +379,7 @@ def print_object(obj):
     :return:
     """
     tmp = []
-    for k, v in iteritems(obj.__dict__):
+    for k, v in obj.__dict__.items():
         if not k.startswith('__') and k != "raw_data":
             if isinstance(v, bytes):
                 tmp.append("%s:'%s'" % (k, v))
@@ -419,7 +414,7 @@ def dict_to_python_object(d):
     :return:
     """
     attr = {}
-    for k, v in iteritems(d):
+    for k, v in d.items():
         if not isinstance(k, compat.string_types):
             k = compat.convert_to_string(k)
         k = pythonize_name(k)
@@ -445,7 +440,7 @@ def _decorated(*args, **kwds):
                                         (f.__code__.co_varnames[i],
                                          v,
                                          types[f.__code__.co_varnames[i]]))
-            for k, v in iteritems(kwds):
+            for k, v in kwds.items():
                 if k in types:
                     if v is None:
                         raise ValueError('arg "%s" should not be None' % k)
diff --git a/sample/aihc/README.md b/sample/aihc/README.md
index 9b2ecd90..a2ec0307 100644
--- a/sample/aihc/README.md
+++ b/sample/aihc/README.md
@@ -63,9 +63,9 @@ Before running any samples, please update the configuration in [aihc_sample_conf
 
 2. **Install Dependencies**:
    ```bash
-   pip install future six pycryptodome
+   pip install six pycryptodome
    # or
-   pip3 install future six pycryptodome
+   pip3 install six pycryptodome
    ```
 
 3. **Configure Credentials**: Update [aihc_sample_conf.py](aihc_sample_conf.py)
diff --git a/sample/bos/bos_sample.py b/sample/bos/bos_sample.py
index 8198ddf1..cbb709d7 100644
--- a/sample/bos/bos_sample.py
+++ b/sample/bos/bos_sample.py
@@ -11,7 +11,6 @@
 """
 Samples for bos client.
 """
-from __future__ import print_function
 import os
 import random
 import string
diff --git a/setup.py b/setup.py
index 54ca7b6e..281de624 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,6 @@
 """
 The setup script to install BCE SDK for python
 """
-from __future__ import absolute_import
 import io
 import os
 import re
@@ -30,7 +29,6 @@
     name='bce-python-sdk',
     version=SDK_VERSION,
     install_requires=['pycryptodome>=3.8.0',
-                      'future>=0.6.0',
                       'six>=1.4.0'],
     python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, <4',
     packages=['baidubce',
diff --git a/test/bos/test_client_py2_and_py3.py b/test/bos/test_client_py2_and_py3.py
index 801c8b86..617d571b 100644
--- a/test/bos/test_client_py2_and_py3.py
+++ b/test/bos/test_client_py2_and_py3.py
@@ -15,12 +15,6 @@
 Test models of BOS.
 """
 # compatibility py2 and py3
-from __future__ import absolute_import
-from builtins import str
-from builtins import bytes
-from future.utils import iteritems
-from future.utils import iterkeys
-from future.utils import itervalues
 
 import base64
 import multiprocessing