diff --git a/httprunner/__about__.py b/httprunner/__about__.py
index cfcc2fe6..ae75cc5f 100644
--- a/httprunner/__about__.py
+++ b/httprunner/__about__.py
@@ -1,7 +1,7 @@
 __title__ = 'HttpRunner'
 __description__ = 'One-stop solution for HTTP(S) testing.'
 __url__ = 'https://github.com/HttpRunner/HttpRunner'
-__version__ = '1.4.6'
+__version__ = '1.4.7'
 __author__ = 'debugtalk'
 __author_email__ = 'mail@debugtalk.com'
 __license__ = 'MIT'
diff --git a/httprunner/context.py b/httprunner/context.py
index 9f24e83d..9059242c 100644
--- a/httprunner/context.py
+++ b/httprunner/context.py
@@ -188,17 +188,21 @@ class Context(object):
             }
         """
         check_item = validator["check"]
-        # check_item should only be in 4 types:
+        # check_item should only be the following 5 formats:
         # 1, variable reference, e.g. $token
-        # 2, string joined by delimiter. e.g. "status_code", "headers.content-type"
-        # 3, regex string, e.g. "LB[\d]*(.*)RB[\d]*"
-        # 4, dict or list, maybe containing variables reference, e.g. {"var": "$abc"}
-        if isinstance(check_item, (dict, list)) or testcase.extract_variables(check_item):
-            # type 4 or type 1
+        # 2, function reference, e.g. ${is_status_code_200($status_code)}
+        # 3, dict or list, maybe containing variable/function reference, e.g. {"var": "$abc"}
+        # 4, string joined by delimiter. e.g. "status_code", "headers.content-type"
+        # 5, regex string, e.g. "LB[\d]*(.*)RB[\d]*"
+
+        if isinstance(check_item, (dict, list)) \
+            or testcase.extract_variables(check_item) \
+            or testcase.extract_functions(check_item):
+            # format 1/2/3
             check_value = self.eval_content(check_item)
         else:
             try:
-                # type 2 or type 3
+                # format 4/5
                 check_value = resp_obj.extract_field(check_item)
             except exception.ParseResponseError:
                 msg = "failed to extract check item from response!\n"
diff --git a/tests/debugtalk.py b/tests/debugtalk.py
index a88684fb..5cd762ce 100644
--- a/tests/debugtalk.py
+++ b/tests/debugtalk.py
@@ -38,6 +38,9 @@ def sum_status_code(status_code, expect_sum):
 
     assert sum_value == expect_sum
 
+def is_status_code_200(status_code):
+    return status_code == 200
+
 os.environ["TEST_ENV"] = "PRODUCTION"
 
 def skip_test_in_production_env():
diff --git a/tests/test_context.py b/tests/test_context.py
index d9beb998..647390bc 100644
--- a/tests/test_context.py
+++ b/tests/test_context.py
@@ -262,7 +262,8 @@ class VariableBindsUnittest(ApiServerUnittest):
         validators = [
             {"eq": ["$resp_status_code", 201]},
             {"check": "$resp_status_code", "comparator": "eq", "expect": 201},
-            {"check": "$resp_body_success", "comparator": "eq", "expect": True}
+            {"check": "$resp_body_success", "comparator": "eq", "expect": True},
+            {"check": "${is_status_code_200($resp_status_code)}", "comparator": "eq", "expect": False}
         ]
         variables = [
             {"resp_status_code": 200},
@@ -278,6 +279,11 @@ class VariableBindsUnittest(ApiServerUnittest):
             {"resp_body_success": True}
         ]
         self.context.bind_variables(variables)
+        from tests.debugtalk import is_status_code_200
+        functions = {
+            "is_status_code_200": is_status_code_200
+        }
+        self.context.bind_functions(functions)
 
         self.assertTrue(self.context.validate(validators, resp_obj))