The reason why the younger generation made mistakes in ancient times was that the older generation always demanded family discipline: in ancient society, the family was a very important social unit. The education, management and punishment of the elders to the younger generation are based on the consideration of family interests and family face. Family law refers to the applicable legal system within the family, and it is also a way of internal management of the family. In ancient society, in order to safeguard the dignity and interests of the family, family members must respect each other and abide by the rules. In this case, family law becomes a binding force. When the younger generation makes mistakes, it will not only affect their own reputation, but also affect the reputation and interests of the whole family. Therefore, the elders demand "please family law", that is, let the younger generation accept the punishment and punishment within the family to warn future generations, and it is also an authoritative display of family leaders. Family law punishment can not only give corresponding punishment to violators, but also strengthen the authority of family deliberation system through examination and approval. For the elders, punishing the younger generation through the "please family law" shows their ability to control family affairs and also improves their social status and reputation.