diff --git a/apps/pm/migrations/0015_utask_count_day.py b/apps/pm/migrations/0015_utask_count_day.py
new file mode 100644
index 00000000..3a077f2f
--- /dev/null
+++ b/apps/pm/migrations/0015_utask_count_day.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2023-11-27 07:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pm', '0014_mtask_peifen_kg'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='utask',
+            name='count_day',
+            field=models.PositiveIntegerField(default=0, verbose_name='日均任务数'),
+        ),
+    ]
diff --git a/apps/pm/models.py b/apps/pm/models.py
index 42d5e148..770ffca2 100644
--- a/apps/pm/models.py
+++ b/apps/pm/models.py
@@ -34,6 +34,7 @@ class Utask(CommonBDModel):
         Material, verbose_name='领用物', on_delete=models.CASCADE, related_name='utask_material_in', null=True, blank=True)
     count = models.PositiveIntegerField('任务数', default=1)
     count_real = models.PositiveIntegerField('实际生产数', default=0)
+    count_day = models.PositiveIntegerField('日均任务数', default=0)
     count_ok = models.PositiveIntegerField('合格数', default=0)
     count_notok = models.PositiveIntegerField('不合格数', default=0)
     start_date = models.DateField('计划开工日期')
diff --git a/apps/pm/serializers.py b/apps/pm/serializers.py
index 10721915..2fa97378 100644
--- a/apps/pm/serializers.py
+++ b/apps/pm/serializers.py
@@ -1,5 +1,6 @@
 from rest_framework import serializers
-from rest_framework.exceptions import ValidationError
+from rest_framework.exceptions import ValidationError, ParseError
+import math
 
 from apps.mtm.serializers import MaterialSimpleSerializer
 from apps.pm.models import Mtask, Utask
@@ -19,8 +20,15 @@ class UtaskSerializer(CustomModelSerializer):
         fields = '__all__'
 
     def validate(self, attrs):
+        end_date = attrs['end_date']
+        start_date = attrs['start_date']
         if 'mgroup' in attrs and attrs['mgroup']:
             attrs['belong_dept'] = attrs['mgroup'].belong_dept
+        try:
+            rela_days = (end_date - start_date).days + 1
+            attrs['count_day'] = math.ceil(attrs['count']/rela_days)
+        except Exception:
+            raise ParseError('日均任务数计划失败')
         return attrs
 
     def update(self, instance, validated_data):