diff --git a/submission/views.py b/submission/views.py
index 50102a05..f12b52cb 100644
--- a/submission/views.py
+++ b/submission/views.py
@@ -149,7 +149,7 @@ class SubmissionAdminAPIView(APIView):
         problem_id = request.GET.get("problem_id", None)
         if not problem_id:
             return error_response(u"参数错误")
-        submissions = Submission.objects.filter(problem_id=problem_id).order_by("-create_time")
+        submissions = Submission.objects.filter(problem_id=problem_id, contest_id__isnumm=True).order_by("-create_time")
         return paginate(request, submissions, SubmissionSerializer)