diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index 6e6515a9..0fc878bc 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -271,6 +271,8 @@ class MIOSaleSerializer(CustomModelSerializer):
     def create(self, validated_data):
         validated_data['type'] = MIO.MIO_TYPE_SALE_OUT
         order: Order = validated_data.get('order', None)
+        if not validated_data.get("number", None):
+            validated_data["number"] = MIO.get_a_number(validated_data["type"])
         if order:
             if order.state in [Order.ORDER_CREATE, Order.ORDER_DELIVERED]:
                 raise ValidationError('销售订单状态错误')