diff --git a/httprunner/client.py b/httprunner/client.py
index 3de42679..4444e81d 100644
--- a/httprunner/client.py
+++ b/httprunner/client.py
@@ -6,6 +6,7 @@ import time
 import requests
 import urllib3
 from httprunner import logger
+from httprunner.compat import urljoin
 from httprunner.exception import ParamsError
 from requests import Request, Response
 from requests.exceptions import (InvalidSchema, InvalidURL, MissingSchema,
@@ -46,7 +47,7 @@ class HttpSession(requests.Session):
         if absolute_http_url_regexp.match(path):
             return path
         elif self.base_url:
-            return "%s%s" % (self.base_url, path)
+            return urljoin(self.base_url, path)
         else:
             raise ParamsError("base url missed!")
 
diff --git a/httprunner/compat.py b/httprunner/compat.py
index 3753affc..75d731fe 100644
--- a/httprunner/compat.py
+++ b/httprunner/compat.py
@@ -34,6 +34,7 @@ except ImportError:
 
 if is_py2:
     from urllib3.packages.ordered_dict import OrderedDict
+    from urlparse import urljoin
 
     builtin_str = str
     bytes = str
@@ -44,6 +45,7 @@ if is_py2:
 
 elif is_py3:
     from collections import OrderedDict
+    from urllib.parse import urljoin
 
     builtin_str = str
     str = str