diff --git a/apps/qm/migrations/0004_alter_quastat_rate_pass.py b/apps/qm/migrations/0004_alter_quastat_rate_pass.py
new file mode 100644
index 00000000..af1fb939
--- /dev/null
+++ b/apps/qm/migrations/0004_alter_quastat_rate_pass.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2023-07-05 06:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('qm', '0003_auto_20230627_1348'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='quastat',
+            name='rate_pass',
+            field=models.FloatField(blank=True, null=True, verbose_name='合格率'),
+        ),
+    ]
diff --git a/apps/qm/models.py b/apps/qm/models.py
index 66acf677..e0371e4f 100644
--- a/apps/qm/models.py
+++ b/apps/qm/models.py
@@ -25,4 +25,4 @@ class QuaStat(CommonBDModel):
     val_avg = models.FloatField('平均值', null=True, blank=True)
     num_test = models.PositiveSmallIntegerField('检测次数', null=True, blank=True)
     num_ok = models.PositiveSmallIntegerField('合格次数', null=True, blank=True)
-    rate_pass = models.FloatField('合格率')
\ No newline at end of file
+    rate_pass = models.FloatField('合格率', null=True, blank=True)
\ No newline at end of file