diff --git a/apps/qm/migrations/0044_testitem_cd_expr.py b/apps/qm/migrations/0044_testitem_cd_expr.py
new file mode 100644
index 00000000..1d3c529b
--- /dev/null
+++ b/apps/qm/migrations/0044_testitem_cd_expr.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2025-02-26 01:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('qm', '0043_ftestitem_test_equip'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='testitem',
+            name='cd_expr',
+            field=models.TextField(blank=True, null=True, verbose_name='采集表达式'),
+        ),
+    ]
diff --git a/apps/qm/models.py b/apps/qm/models.py
index 7613dd05..f15e433d 100644
--- a/apps/qm/models.py
+++ b/apps/qm/models.py
@@ -134,6 +134,7 @@ class TestItem(CommonAModel):
     readonly = models.BooleanField('只读', default=False)
     formula = models.TextField('计算公式', null=True, blank=True)
     affects = models.JSONField('影响项列表', default=list, blank=True)
+    cd_expr = models.TextField('采集表达式', null=True, blank=True)
 
     class Meta:
         ordering = ['sort', '-create_time']
diff --git a/apps/qm/serializers.py b/apps/qm/serializers.py
index 976d9e39..df6088c8 100644
--- a/apps/qm/serializers.py
+++ b/apps/qm/serializers.py
@@ -44,6 +44,7 @@ class QctTestItemSerializer(CustomModelSerializer):
     testitem_description = serializers.CharField(source='testitem.description', read_only=True)
     testitem_field_type = serializers.CharField(source='testitem.field_type', read_only=True)
     testitem_choices = serializers.CharField(source='testitem.choices', read_only=True)
+    testitem_cd_expr = serializers.CharField(source='testitem.cd_expr', read_only=True)
     class Meta:
         model = QctTestItem
         fields = '__all__'