diff --git a/apps/assets/tasks/nodes_amount.py b/apps/assets/tasks/nodes_amount.py
index 2f8f0592d..c6ad2e8ba 100644
--- a/apps/assets/tasks/nodes_amount.py
+++ b/apps/assets/tasks/nodes_amount.py
@@ -8,6 +8,8 @@ from assets.utils import check_node_assets_amount
 
 from common.utils.lock import AcquireFailed
 from common.utils import get_logger
+from common.const.crontab import CRONTAB_AT_AM_TWO
+
 
 logger = get_logger(__file__)
 
@@ -29,7 +31,7 @@ def check_node_assets_amount_task(org_id=None):
             logger.error(error)
 
 
-@register_as_period_task(crontab='0 2 * * *')
+@register_as_period_task(crontab=CRONTAB_AT_AM_TWO)
 @shared_task
 def check_node_assets_amount_period_task():
     check_node_assets_amount_task()
diff --git a/apps/common/const/crontab.py b/apps/common/const/crontab.py
new file mode 100644
index 000000000..bd9809176
--- /dev/null
+++ b/apps/common/const/crontab.py
@@ -0,0 +1,5 @@
+
+CRONTAB_AT_AM_TWO = '0 14 * * *'
+CRONTAB_AT_AM_TEN = '0 10 * * *'
+CRONTAB_AT_PM_TWO = '0 2 * * *'
+
diff --git a/apps/perms/tasks.py b/apps/perms/tasks.py
index 30c9600d3..564e5657e 100644
--- a/apps/perms/tasks.py
+++ b/apps/perms/tasks.py
@@ -10,6 +10,7 @@ from celery import shared_task
 from orgs.utils import tmp_to_root_org
 from common.utils import get_logger
 from common.utils.timezone import local_now, dt_formatter, dt_parser
+from common.const.crontab import CRONTAB_AT_AM_TEN
 from ops.celery.decorator import register_as_period_task
 from perms.notifications import (
     PermedAssetsWillExpireUserMsg, AssetPermsWillExpireForOrgAdminMsg,
@@ -54,7 +55,7 @@ def check_asset_permission_expired():
     UserGrantedTreeRefreshController.add_need_refresh_by_asset_perm_ids_cross_orgs(asset_perm_ids)
 
 
-@register_as_period_task(crontab='0 10 * * *')
+@register_as_period_task(crontab=CRONTAB_AT_AM_TEN)
 @shared_task()
 @atomic()
 @tmp_to_root_org()
diff --git a/apps/users/tasks.py b/apps/users/tasks.py
index ea6426aa4..cddf0d2ec 100644
--- a/apps/users/tasks.py
+++ b/apps/users/tasks.py
@@ -15,6 +15,7 @@ from orgs.models import Organization
 from .models import User
 from users.notifications import UserExpirationReminderMsg
 from settings.utils import LDAPServerUtil, LDAPImportUtil
+from common.const.crontab import CRONTAB_AT_AM_TEN, CRONTAB_AT_PM_TWO
 
 
 logger = get_logger(__file__)
@@ -41,7 +42,7 @@ def check_password_expired_periodic():
         'check_password_expired_periodic': {
             'task': check_password_expired.name,
             'interval': None,
-            'crontab': '0 10 * * *',
+            'crontab': CRONTAB_AT_AM_TEN,
             'enabled': True,
         }
     }
@@ -72,7 +73,7 @@ def check_user_expired_periodic():
         'check_user_expired_periodic': {
             'task': check_user_expired.name,
             'interval': None,
-            'crontab': '0 14 * * *',
+            'crontab': CRONTAB_AT_PM_TWO,
             'enabled': True,
         }
     }