diff --git a/api/events/event_handlers/__init__.py b/api/events/event_handlers/__init__.py
index ceb50a252b..c82b8a92d9 100644
--- a/api/events/event_handlers/__init__.py
+++ b/api/events/event_handlers/__init__.py
@@ -5,6 +5,7 @@ from .create_installed_app_when_app_created import handle
 from .create_site_record_when_app_created import handle
 from .deduct_quota_when_messaeg_created import handle
 from .delete_installed_app_when_app_deleted import handle
+from .delete_site_record_when_app_deleted import handle
 from .delete_tool_parameters_cache_when_sync_draft_workflow import handle
 from .delete_workflow_as_tool_when_app_deleted import handle
 from .update_app_dataset_join_when_app_model_config_updated import handle
diff --git a/api/events/event_handlers/delete_site_record_when_app_deleted.py b/api/events/event_handlers/delete_site_record_when_app_deleted.py
new file mode 100644
index 0000000000..2e476d3d53
--- /dev/null
+++ b/api/events/event_handlers/delete_site_record_when_app_deleted.py
@@ -0,0 +1,11 @@
+from events.app_event import app_was_deleted
+from extensions.ext_database import db
+from models.model import Site
+
+
+@app_was_deleted.connect
+def handle(sender, **kwargs):
+    app = sender
+    site = db.session.query(Site).filter(Site.app_id == app.id).first()
+    db.session.delete(site)
+    db.session.commit()