您可以使用迁移文件执行此操作，

class Migration(migrations.Migration):

    dependencies = [
        ( .....),
    ]
    operations = [
        migrations.AddField(
            model_name="Model1",
            name="field1",
        ),
        migrations.RunPython(forwards_migrate_data_from_field2_to_field1,reverse_migrate_data_from_field2_to_field1),
        migrations.RemoveField(
            model_name='model2',
            name='field2'
        )
    ]

并且在forwards_migrate_data_from_field2_to_field1函数中，你需要做移动数据的过程，请在django docs中查看此链接：https://docs.djangoproject.com/en/4.1/ref/migration-operations/#runpython

def forwards_migrate_data_from_field2_to_field1(apps, schema_editor):
    # we move from model2 to model1
    model2 = apps.get_model("app", "model2")
    model1 = apps.get_model("app", "model1")
    db_alias = schema_editor.connection.alias
    list_field2 = (
        models2.objects.using(db_alias)
        .all()
        .values_list("field2",)
    )
    model1.objects.using(db_alias).bulk_create(
        [
            model1(
                field2=field2,
            )
            for field2 in list_field2
        ]
    )