diff --git a/app/scheduler.py b/app/scheduler.py
index 342b1950c..7306ea0cd 100644
--- a/app/scheduler.py
+++ b/app/scheduler.py
@@ -682,6 +682,16 @@ class Scheduler(ConfigReloadMixin, metaclass=SingletonClass):
                 kwargs={"job_id": "scheduler_job"},
             )
 
+            # 缓存清理服务
+            self._scheduler.add_job(
+                self.start,
+                "interval",
+                id="clear_cache",
+                name="缓存清理",
+                hours=24,
+                kwargs={"job_id": "clear_cache"},
+            )
+
             # 数据表清理服务，每天凌晨执行一次
             if settings.DATA_CLEANUP_ENABLE:
                 self._scheduler.add_job(
diff --git a/tests/test_scheduler_cache_expiry.py b/tests/test_scheduler_cache_expiry.py
index 1fa26d763..9566a160c 100644
--- a/tests/test_scheduler_cache_expiry.py
+++ b/tests/test_scheduler_cache_expiry.py
@@ -45,8 +45,8 @@ def test_scheduler_initializer_starts_background_jobs(monkeypatch):
     scheduler.init.assert_called_once_with()
 
 
-def test_meta_cache_expire_does_not_schedule_bulk_cache_clear(monkeypatch):
-    """单条缓存 TTL 不应再被用于注册整批缓存清理任务。"""
+def test_meta_cache_expire_does_not_control_cache_clear_interval(monkeypatch):
+    """缓存清理任务应使用固定间隔，不受 META_CACHE_EXPIRE 控制。"""
     background_scheduler = _BackgroundSchedulerStub()
     generic_chain = Mock()
     for name in [
@@ -98,6 +98,11 @@ def test_meta_cache_expire_does_not_schedule_bulk_cache_clear(monkeypatch):
     scheduler.init()
 
     scheduled_job_ids = {job["id"] for job in background_scheduler.jobs}
-    assert "clear_cache" not in scheduled_job_ids
+    assert "clear_cache" in scheduled_job_ids
     assert "clear_cache" in scheduler._jobs
+    # 缓存清理使用固定 24 小时间隔，不受 META_CACHE_EXPIRE 控制
+    clear_cache_job = next(
+        job for job in background_scheduler.jobs if job["id"] == "clear_cache"
+    )
+    assert clear_cache_job["hours"] == 24
     assert background_scheduler.started is True