diff --git a/apps/inm/migrations/0031_mioitem_unit_price.py b/apps/inm/migrations/0031_mioitem_unit_price.py
new file mode 100644
index 00000000..6c6d1b67
--- /dev/null
+++ b/apps/inm/migrations/0031_mioitem_unit_price.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2025-06-19 02:36
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inm', '0030_auto_20250523_0922'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='mioitem',
+            name='unit_price',
+            field=models.DecimalField(blank=True, decimal_places=2, max_digits=14, null=True, verbose_name='单价'),
+        ),
+    ]
diff --git a/apps/inm/models.py b/apps/inm/models.py
index 2428fd06..a0c931b9 100644
--- a/apps/inm/models.py
+++ b/apps/inm/models.py
@@ -139,6 +139,7 @@ class MIOItem(BaseModel):
     material = models.ForeignKey(
         Material, verbose_name='物料', on_delete=models.CASCADE)
     batch = models.TextField('批次号', db_index=True)
+    unit_price = models.DecimalField('单价', max_digits=14, decimal_places=2, null=True, blank=True)
     count = models.DecimalField('出入数量', max_digits=12, decimal_places=3)
     count_tested = models.PositiveIntegerField('已检数', null=True, blank=True)
     test_date = models.DateField('检验日期', null=True, blank=True)