diff --git a/httprunner/built_in.py b/httprunner/built_in.py
index ff36dcfd..cbbc85d1 100644
--- a/httprunner/built_in.py
+++ b/httprunner/built_in.py
@@ -133,26 +133,6 @@ def endswith(check_value, expect_value):
 
 """ built-in hooks
 """
-def setup_hook_prepare_kwargs(request):
-    if request["method"] == "POST":
-        req_headers = lower_dict_keys(request.get("headers", {}))
-        content_type = req_headers.get("content-type")
-        if content_type and "data" in request:
-            req_data = request["data"]
-
-            # if request content-type is application/json, request data should be dumped
-            if content_type.startswith("application/json") and isinstance(req_data, (dict, list)):
-                req_data = json.dumps(req_data)
-
-            # if request content-type is application/x-www-form-urlencoded, request data should be in params format
-            elif content_type.startswith("application/x-www-form-urlencoded") and isinstance(req_data, dict):
-                req_data = convert_dict_to_params(req_data)
-
-            if isinstance(req_data, str):
-                req_data = req_data.encode('utf-8')
-
-            request["data"] = req_data
-
 def sleep_N_secs(n_secs):
     """ sleep n seconds
     """
diff --git a/httprunner/runner.py b/httprunner/runner.py
index e3754e8d..c815efda 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -203,9 +203,9 @@ class Runner(object):
         self.session_context.update_test_variables("request", parsed_test_request)
 
         # setup hooks
-        setup_hooks = ["${setup_hook_prepare_kwargs($request)}"]
-        setup_hooks.extend(test_dict.get("setup_hooks", []))
-        self.do_hook_actions(setup_hooks, "setup")
+        setup_hooks = test_dict.get("setup_hooks", [])
+        if setup_hooks:
+            self.do_hook_actions(setup_hooks, "setup")
 
         try:
             url = parsed_test_request.pop('url')
diff --git a/tests/test_client.py b/tests/test_client.py
index 1facac54..d01a528c 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -1,4 +1,3 @@
-from httprunner.built_in import setup_hook_prepare_kwargs
 from httprunner.client import HttpSession
 from httprunner.compat import bytes
 from tests.base import ApiServerUnittest
@@ -39,52 +38,18 @@ class TestHttpClient(ApiServerUnittest):
         self.assertEqual(201, resp.status_code)
         self.assertEqual(True, resp.json()['success'])
 
-    def test_prepare_kwargs_content_type_application_json_without_charset(self):
-        request = {
-            "url": "/path",
-            "method": "POST",
-            "headers": {
-                "content-type": "application/json"
-            },
-            "data": {
-                "a": 1,
-                "b": 2
-            }
+    def test_request_post_data(self):
+        url = "/api/users/1000"
+        data = {
+            'name': 'user1',
+            'password': '123456'
         }
-        setup_hook_prepare_kwargs(request)
-        self.assertIsInstance(request["data"], bytes)
-        self.assertIn(b'"a": 1', request["data"])
-        self.assertIn(b'"b": 2', request["data"])
-
-    def test_prepare_kwargs_content_type_application_json_charset_utf8(self):
-        request = {
-            "url": "/path",
-            "method": "POST",
-            "headers": {
-                "content-type": "application/json; charset=utf-8"
-            },
-            "data": {
-                "a": 1,
-                "b": 2
-            }
-        }
-        setup_hook_prepare_kwargs(request)
-        self.assertIsInstance(request["data"], bytes)
-
-    def test_prepare_kwargs_content_type_x_www_form_urlencoded(self):
-        request = {
-            "url": "/path",
-            "method": "POST",
-            "headers": {
-                "content-type": "application/x-www-form-urlencoded; charset=utf-8"
-            },
-            "data": {
-                "a": 1,
-                "b": 2
-            }
-        }
-        setup_hook_prepare_kwargs(request)
-        self.assertIsInstance(request["data"], bytes)
-        self.assertIn(b'a=1', request["data"])
-        self.assertIn(b'&', request["data"])
-        self.assertIn(b'b=2', request["data"])
+        resp = self.api_client.post(url, json=data, headers=self.headers)
+        # b'{"name": "user1", "password": "123456"}'
+        self.assertIn(b'"name": "user1"', resp.request.body)
+        self.assertIn(b'"password": "123456"', resp.request.body)
+        resp = self.api_client.post(url, data=data, headers=self.headers)
+        # name=user1&password=123456
+        self.assertIn("name=user1", resp.request.body)
+        self.assertIn("&", resp.request.body)
+        self.assertIn("password=123456", resp.request.body)