diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index c9788c08..b4fbc8cc 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -87,9 +87,13 @@ def do_out(mio: MIO):
     do_user = mio.do_user
     mioitems = MIOItem.objects.filter(mio=mio)
     for item in mioitems:
+        # 用于混料的原料不与车间库存交互
+        material = item.material
+        if material.type in [Material.MA_TYPE_MAINSO, Material.MA_TYPE_HELPSO]:
+            continue
         action_list = []
         mias = MIOItemA.objects.filter(mioitem=item)
-        if mias.exists():  # 组合件入库
+        if mias.exists():
             mias_list = list(mias.values_list('material', 'batch', 'rate'))
             for i in range(len(mias_list)):
                 material, batch, rate = mias_list[i]
@@ -121,6 +125,10 @@ def do_in(mio: MIO):
     do_user = mio.do_user
     mioitems = MIOItem.objects.filter(mio=mio)
     for item in mioitems:
+        # 用于混料的原料不与车间库存交互
+        material = item.material
+        if material.type in [Material.MA_TYPE_MAINSO, Material.MA_TYPE_HELPSO]:
+            continue
         action_list = []
         mias = MIOItemA.objects.filter(mioitem=item)
         if mias.exists():  # 组合件入库