diff --git a/apps/wpm/migrations/0107_alter_handoverb_handover.py b/apps/wpm/migrations/0107_alter_handoverb_handover.py
new file mode 100644
index 00000000..b0c08eed
--- /dev/null
+++ b/apps/wpm/migrations/0107_alter_handoverb_handover.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.2.12 on 2025-03-31 08:04
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('wpm', '0106_alter_handover_type'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='handoverb',
+            name='handover',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='b_handover', to='wpm.handover', verbose_name='关联交接记录'),
+        ),
+    ]
diff --git a/apps/wpm/models.py b/apps/wpm/models.py
index 1e4d071d..84b46ff1 100644
--- a/apps/wpm/models.py
+++ b/apps/wpm/models.py
@@ -529,7 +529,7 @@ class Handover(CommonADModel):
 class Handoverb(BaseModel):
     """TN: 子级交接记录
     """
-    handover = models.ForeignKey(Handover, verbose_name='关联交接记录', on_delete=models.CASCADE)
+    handover = models.ForeignKey(Handover, verbose_name='关联交接记录', on_delete=models.CASCADE, related_name="b_handover")
     batch = models.TextField("批次号", null=True, blank=True)
     wm = models.ForeignKey(WMaterial, verbose_name='关联车间库存', on_delete=models.SET_NULL,
                            null=True, blank=True, related_name='handoverb_wm')
@@ -614,15 +614,16 @@ class BatchSt(BaseModel):
         
     @classmethod
     @transaction.atomic
-    def init_dag(cls, batch:str, force_update=False):
+    def init_dag(cls, batch:str):
         """
-        更新批次数据关系链
+        更新批次数据关系链(初步)
         """
-        ins:BatchSt = cls.g_create(batch)
+        ins, _ = cls.g_create(batch)
         if ins.mio is None and ins.handover is None and ins.mlog is None:
-            force_update = True
-        if force_update:
-            pass
+            from apps.inm.models import MIOItem
+            mioitem = MIOItem.objects.filter(batch=batch, mio__submit_time__isnull=False).order_by('mio__submit_time').first()
+            handover = Handover.objects.filter(mtype=20, b_handover__batch=batch, submit_time__isnull=False).order_by('submit_time').first() # 拆分
+            handover2 = Handover.objects.filter(mtype=10, b_handover__batch=batch, submit_time__isnull=False).order_by('submit_time').first() # 合并
         return ins
         
 class BatchLog(BaseModel):