你可以接收pre_delete或post_delete信号（请参见下面的@toto_tico的注释），并在FileField对象上调用delete（）方法，因此（在models.py中）：
class MyModel(models.Model):
file = models.FileField()
...
# Receive the pre_delete signal and delete the file associated with the model instance.
from django.db.models.signals import pre_delete
from django.dispatch.dispatcher import receiver
@receiver(pre_delete, sender=MyModel)
def mymodel_delete(sender, instance, **kwargs):
# Pass false so FileField doesn't save the model.
instance.file.delete(False)
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