diff --git a/README.md b/README.md
index 5b9c461..c779170 100644
--- a/README.md
+++ b/README.md
@@ -190,7 +190,8 @@ client.verify_valid_address("ETH", "0x05325e6f9d1f0437bd78a72c2ae084fbb8c039ee")
 
 #### Get Address History List
 ```python
-client.get_address_history("ETH",0, 10)
+from cobo_custody.model.enums import SortFlagEnum
+client.get_address_history("ETH",0, 10, sort_flag=SortFlagEnum.DESCENDING)
 ```
 <details>
 <summary>View Response</summary>
diff --git a/cobo_custody/client/client.py b/cobo_custody/client/client.py
index 6fb207e..4f17da1 100644
--- a/cobo_custody/client/client.py
+++ b/cobo_custody/client/client.py
@@ -10,6 +10,7 @@
 from cobo_custody.error.api_error import ApiError
 from cobo_custody.signer.api_signer import ApiSigner
 from cobo_custody.signer.local_signer import verify_ecdsa_signature
+from cobo_custody.model.enums import SortFlagEnum
 
 
 class Client(object):
@@ -122,9 +123,9 @@ def batch_verify_deposit_address(self, coin: str, addresses: str) -> ApiResponse
     def verify_valid_address(self, coin: str, address: str) -> ApiResponse:
         return self.request("GET", "/v1/custody/is_valid_address/", {"coin": coin, "address": address})
 
-    def get_address_history(self, coin: str, page_index=None, page_length=None) -> ApiResponse:
+    def get_address_history(self, coin: str, page_index=None, page_length=None, sort_flag=SortFlagEnum.DESCENDING) -> ApiResponse:
         return self.request("GET", "/v1/custody/address_history/", {
-            "coin": coin, "page_index": page_index, "page_length": page_length})
+            "coin": coin, "page_index": page_index, "page_length": page_length, "sort_flag": sort_flag.value})
 
     # loop alliance
     def check_loop_address_details(self, coin: str, address: str, memo: str = None) -> ApiResponse:
diff --git a/cobo_custody/model/__init__.py b/cobo_custody/model/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/cobo_custody/model/__pycache__/__init__.cpython-37.pyc b/cobo_custody/model/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 0000000..af67927
Binary files /dev/null and b/cobo_custody/model/__pycache__/__init__.cpython-37.pyc differ
diff --git a/cobo_custody/model/__pycache__/enums.cpython-37.pyc b/cobo_custody/model/__pycache__/enums.cpython-37.pyc
new file mode 100644
index 0000000..da34458
Binary files /dev/null and b/cobo_custody/model/__pycache__/enums.cpython-37.pyc differ
diff --git a/cobo_custody/model/enums.py b/cobo_custody/model/enums.py
new file mode 100644
index 0000000..949d14b
--- /dev/null
+++ b/cobo_custody/model/enums.py
@@ -0,0 +1,6 @@
+from enum import IntEnum
+
+
+class SortFlagEnum(IntEnum):
+    DESCENDING = 0
+    ASCENDING = 1
diff --git a/test.py b/test.py
index 668dd77..d049c19 100644
--- a/test.py
+++ b/test.py
@@ -5,6 +5,7 @@
 
 import unittest
 from cobo_custody.client import Client
+from cobo_custody.model.enums import SortFlagEnum
 from cobo_custody.signer.local_signer import LocalSigner
 from parameterized import param, parameterized
 import sys
@@ -215,6 +216,17 @@ def test_get_invalid_address_history_with_invalid_page(self, coin, page_index, p
         # Coin BTTB not supported, please add it on admin web.
         self.assertEqual(response.exception.errorCode, 1011)
 
+    @parameterized.expand(
+        [
+            param(coin="BTC", page_index=0, page_length=10, sort_flag=SortFlagEnum.ASCENDING),
+        ]
+    )
+    def test_get_address_history_with_sort(self, coin, page_index, page_length, sort_flag):
+        response = self.client.get_address_history(
+            coin=coin, page_index=page_index, page_length=page_length, sort_flag=sort_flag)
+        self.assertTrue(response.success)
+        self.assertTrue(len(response.result) > 0)
+
     @parameterized.expand(
         [
             param(coin="BTC", memo=False),