diff --git a/apps/notifications/api/site_msgs.py b/apps/notifications/api/site_msgs.py
index 632101384..29bd785d5 100644
--- a/apps/notifications/api/site_msgs.py
+++ b/apps/notifications/api/site_msgs.py
@@ -50,6 +50,12 @@ class SiteMessageViewSet(ListModelMixin, RetrieveModelMixin, JMSGenericViewSet):
         SiteMessageUtil.mark_msgs_as_read(user.id, ids)
         return Response({'detail': 'ok'})
 
+    @action(methods=[PATCH], detail=False, url_path='mark-as-read-all')
+    def mark_as_read_all(self, request, **kwargs):
+        user = request.user
+        SiteMessageUtil.mark_msgs_as_read(user.id)
+        return Response({'detail': 'ok'})
+
     @action(methods=[POST], detail=False)
     def send(self, request, **kwargs):
         seri = self.get_serializer(data=request.data)
diff --git a/apps/notifications/site_msg.py b/apps/notifications/site_msg.py
index 7a3c9457f..faa36b5f4 100644
--- a/apps/notifications/site_msg.py
+++ b/apps/notifications/site_msg.py
@@ -1,4 +1,4 @@
-from django.db.models import F
+from django.db.models import F, Q
 from django.db import transaction
 
 from common.utils.timezone import local_now
@@ -80,11 +80,11 @@ class SiteMessageUtil:
         return site_msgs_count
 
     @classmethod
-    def mark_msgs_as_read(cls, user_id, msg_ids):
-        site_msg_users = SiteMessageUsers.objects.filter(
-            user_id=user_id, sitemessage_id__in=msg_ids,
-            has_read=False
-        )
+    def mark_msgs_as_read(cls, user_id, msg_ids=None):
+        q = Q(user_id=user_id) & Q(has_read=False)
+        if msg_ids is not None:
+            q &= Q(sitemessage_id__in=msg_ids)
+        site_msg_users = SiteMessageUsers.objects.filter(q)
 
         for site_msg_user in site_msg_users:
             site_msg_user.has_read = True