diff --git a/apps/resm/tasks.py b/apps/resm/tasks.py
index 742812a..d5f8841 100644
--- a/apps/resm/tasks.py
+++ b/apps/resm/tasks.py
@@ -9,7 +9,7 @@ from django.core.cache import cache
 import requests
 from lxml import etree
 from celery import current_app
-from datetime import datetime
+from datetime import datetime, timedelta
 import random
 
 # config.email = "caoqianming@foxmail.com"
@@ -294,6 +294,13 @@ def send_download_fulltext_task(number_of_task=100):
     
     return f"sent {task_count} download_pdf tasks"
 
+@shared_task(base=CustomTask)
+def release_working_paper():
+    now = datetime.now()
+    five_minutes_ago = datetime.now() - timedelta(minutes=5)
+    qs = Paper.objects.filter(fetch_status__isnull=False, update_time__lte= five_minutes_ago)
+    x = qs.update(fetch_status=None, update_time=now)
+    return f"release {x} papers"
 
 @shared_task(base=CustomTask)
 def download_pdf(paper_id):