diff --git a/apps/mtm/services.py b/apps/mtm/services.py
index ac1da91c..1e8876d4 100644
--- a/apps/mtm/services.py
+++ b/apps/mtm/services.py
@@ -10,20 +10,23 @@ from apps.wpm.services import get_sflog
 from apps.wpm.tasks import cal_exp_duration_sec
 from apps.wf.models import Ticket
 from django.db.models import Sum
+from typing import List
 
-def cal_material_count(materialId_list: list = []):
+def cal_material_count(materialId_list: List[str]=None):
     """
     计算物料总数量
     """
     from apps.inm.models import MaterialBatch
     from apps.wpm.models import WMaterial
+    if materialId_list is None:
+        materialId_list = []
     if materialId_list:
         objs = Material.objects.filter(id__in=set(materialId_list))
     else:
         objs = Material.objects.all()
     for material in objs:
-        mb_count = MaterialBatch.objects.filter(material=material).aggregate(total=Sum("count"))["total"]
-        wm_count = WMaterial.objects.filter(material=material).aggregate(total=Sum("count"))["total"]
+        mb_count = MaterialBatch.objects.filter(material=material).aggregate(total=Sum("count"))["total"] or 0
+        wm_count = WMaterial.objects.filter(material=material).aggregate(total=Sum("count"))["total"] or 0
         if mb_count is None:
             mb_count = 0
         if wm_count is None: