diff --git a/python/paddle_serving_server_gpu/web_service.py b/python/paddle_serving_server_gpu/web_service.py
index 6d2039040178c118f48a09563735d97cca3c10c7..d30f1bfb0c0b7c40e32fe62e53e9882dce4cd18b 100755
--- a/python/paddle_serving_server_gpu/web_service.py
+++ b/python/paddle_serving_server_gpu/web_service.py
@@ -107,6 +107,8 @@ class WebService(object):
             if "fetch" not in request.json:
                 abort(400)
             feed, fetch = self.preprocess(request.json, request.json["fetch"])
+            if "fetch" in feed:
+                del feed["fetch"]
             fetch_map = client_list[0].predict(feed=feed, fetch=fetch)
             fetch_map = self.postprocess(
                 feed=request.json, fetch=fetch, fetch_map=fetch_map)