diff --git a/apps/inm/migrations/0034_mioitemw_number_out.py b/apps/inm/migrations/0034_mioitemw_number_out.py
new file mode 100644
index 00000000..0b54636d
--- /dev/null
+++ b/apps/inm/migrations/0034_mioitemw_number_out.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2025-07-28 08:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inm', '0033_alter_mio_type'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='mioitemw',
+            name='number_out',
+            field=models.TextField(blank=True, null=True, verbose_name='对外编号'),
+        ),
+    ]
diff --git a/apps/inm/models.py b/apps/inm/models.py
index 44a8737d..88d775a2 100644
--- a/apps/inm/models.py
+++ b/apps/inm/models.py
@@ -212,6 +212,7 @@ class MIOItemw(BaseModel):
     TN:单件记录
     """
     number = models.TextField('编号')
+    number_out = models.TextField('对外编号', null=True, blank=True)
     wpr = models.ForeignKey("wpmw.wpr", verbose_name='关联产品', on_delete=models.SET_NULL, related_name='wpr_mioitemw'
                             , null=True, blank=True)
     mioitem = models.ForeignKey(MIOItem, verbose_name='关联出入库明细', on_delete=models.CASCADE, related_name='w_mioitem')
diff --git a/apps/inm/services.py b/apps/inm/services.py
index 9a7db5e9..57c165af 100644
--- a/apps/inm/services.py
+++ b/apps/inm/services.py
@@ -359,6 +359,7 @@ class InmService:
         out = -1
         默认使用count字段做加减
         """
+        mio_type = i.mio.type
         material: Material = i.material
         warehouse = i.warehouse
         tracking = material.tracking
@@ -439,8 +440,11 @@ class InmService:
                             mioitemws = MIOItemw.objects.filter(Q(ftest=None) | Q(ftest__defect_main=None), mioitem=i)
                         if mioitemws.count() != change_count:
                             raise ParseError("出入库与明细数量不一致,操作失败")
+                        number_out = None
+                        if mio_type == MIO.MIO_TYPE_SALE_OUT:
+                            number_out = mioitemw.number_out
                         for mioitemw in mioitemws:
-                            Wpr.change_or_new(wpr=mioitemw.wpr, old_mb=mb)
+                            Wpr.change_or_new(wpr=mioitemw.wpr, old_mb=mb, number_out=number_out)
             else:
                 raise ParseError("不支持的操作")
     
diff --git a/apps/wpmw/models.py b/apps/wpmw/models.py
index 2bb56285..87febd98 100644
--- a/apps/wpmw/models.py
+++ b/apps/wpmw/models.py
@@ -8,6 +8,7 @@ from apps.wpm.models import WmStateOption, Mlogbw, Handoverbw
 from apps.utils.tools import update_dict
 from apps.inm.models import MIOItemw
 from django.db.models import F, Value
+from django.db import IntegrityError
 
 # Create your models here.
 class Wpr(BaseModel):
@@ -31,7 +32,7 @@ class Wpr(BaseModel):
     data = models.JSONField(verbose_name="数据", default=dict, blank=True)
 
     @classmethod
-    def change_or_new(cls, wpr=None, number=None, mb=None, wm=None, old_mb=None, old_wm=None, ftest=None, wpr_from=None, add_version=True):
+    def change_or_new(cls, wpr=None, number=None, mb=None, wm=None, old_mb=None, old_wm=None, ftest=None, wpr_from=None, add_version=True, number_out=None):
         is_create = False
         if wpr is None and number is None:
             raise ParseError("id和number不能同时为空")
@@ -127,6 +128,12 @@ class Wpr(BaseModel):
             ins.save()
         # if ins.mb and ins.wm:
         #     raise ParseError("所属仓库批次和车间批次不可同时存在2")
+        if number_out:
+            try:
+                ins.number_out = number_out
+                ins.save()
+            except IntegrityError:
+                raise ParseError(f"{ins.number}-出库编号-{number_out}-已存在")
         return ins
 
     @classmethod
diff --git a/apps/wpmw/views.py b/apps/wpmw/views.py
index 4cd0b571..f9ab729b 100644
--- a/apps/wpmw/views.py
+++ b/apps/wpmw/views.py
@@ -54,6 +54,14 @@ class WprViewSet(CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin, Cu
         mat = Material.objects.get(id=material_start)
         return Response({"count": count, "last_number": last_number, "material_model":mat.model, "last_number_count": last_number_count})
     
-    def assgin_number_out(self, request, *args, **kwargs):
-        """分配对外编号"""
-        pass
\ No newline at end of file
+    @action(methods=['get'], detail=False, perms_map={'get': '*'})
+    def number_out_last(self, request, *args, **kwargs):
+        """获取最新的出库对外编号"""
+        prefix = request.query_params.get("prefix")
+        wpr_qs_last = Wpr.objects.filter(number_out__startswith=prefix).order_by("number_out").last()
+        if wpr_qs_last:
+            number_out = wpr_qs_last.number_out
+            number_int = number_out.lstrip(prefix).lstrip('0')
+            return Response({"number_out_last": wpr_qs_last.number_out, "number_out_int_last": number_int})
+        else:
+            return Response({"number_out_last": None})
\ No newline at end of file