diff --git a/apps/hrm/services.py b/apps/hrm/services.py
index 8b1838a0..b291ab20 100755
--- a/apps/hrm/services.py
+++ b/apps/hrm/services.py
@@ -16,10 +16,16 @@ from apps.third.models import TDevice
 from apps.third.tapis import dhapis
 from apps.utils.tools import rannum, ranstr
 from apps.utils.face import face_find
+from apps.utils.tools import singleton
 
 myLogger = logging.getLogger('log')
 
-global_face_df = None  #全局人脸库dataframe
+@singleton
+class FaceDb():
+    def __init__(self, face_df) -> None:
+        self.face_df = face_df
+
+facedb = FaceDb(None)
 
 class HrmService:
 
@@ -412,7 +418,7 @@ class HrmService:
             f.write(base64_data)
         # db_path = os.path.join(settings.BASE_DIR, 'media/face')
         # cache_face_db = cache
-        dfs = face_find(img_path=img_path, global_df=global_face_df, model_name='Facenet512')
+        dfs = face_find(img_path=img_path, global_df=facedb.face_df, model_name='Facenet512')
         df = dfs[0]
         if not df.empty:
             matched = df.iloc[0].identity
diff --git a/apps/hrm/tasks.py b/apps/hrm/tasks.py
index 542ac4ba..abb74c00 100755
--- a/apps/hrm/tasks.py
+++ b/apps/hrm/tasks.py
@@ -8,7 +8,7 @@ from dateutil import tz
 from django.core.cache import cache
 
 from apps.hrm.models import Employee
-from apps.hrm.services import HrmService, global_face_df
+from apps.hrm.services import HrmService, facedb
 from apps.third.dahua import dhClient
 from apps.third.tapis import dhapis
 from apps.utils.tasks import CustomTask
@@ -132,5 +132,4 @@ def update_global_face_pd():
     facedata = Employee.objects.filter(facenet512_data__isnull=False, 
                     user__is_active=True).values_list('id', 'facenet512_data')
     cache.set('global_face_data', facedata, timeout=None)
-    global global_face_df
-    global_face_df = pd.DataFrame(list(facedata), columns=["identity", "Facenet512_representation"])
+    facedb.face_df = pd.DataFrame(list(facedata), columns=["identity", "Facenet512_representation"])