《民法典》第464条第2款改变了《合同法》第2条第2款的规定，允许身份关系协议可以根据其性质参照适用合同编规定。此立法转变一方面实现了民法典编纂中婚姻家庭法的回归，另一方面亦是解决司法实践中出现的法律适用问题，填补了身份协议法律适用的空白。离婚协议作为一种涉及财产的身份关系协议，包括解除婚姻关系的典型身份协议也包括财产分割、子女抚养等附随行为，离婚协议对合同规则的参照适用在实践中争议众多，如何适用合同编规则有待研究。本文从身份权、身份法律行为以及身份关系协议出发探寻身份关系协议参照适用合同规则的合理性及内在逻辑，在此基础上，针对实践中围绕离婚协议而产生的具体问题进行针对性讨论，探寻其参照适用合同编规则的可能路径。婚前协议中的离婚条款属于附生效条件的合同，附条件生效的是离婚条款中的财产行为，又因婚前协议的缔结时间与双方离婚具有时间差，客观条件发生当事人难以预见的变化时，可以参照适用情事变更制度。判断假离婚协议的效力时，应区分其中的身份关系和财产关系，解除婚姻关系的身份行为具备登记离婚的意思而有效，对于其中的财产关系则应独立把握。通过假离婚躲避债务损害债权人债权时，离婚协议中的财产安排亦可作为撤销权的行使对象。离婚协议中的赠与条款在实践中存在误将财产分割条款认定为赠与的情形，在个案中应秉承实质重于形式的原则，把握赠与条款背后当事人的真实意思，只有赠与条款独立于离婚协议其他条款时当事人仍有赠与意思，受赠人无需负担“对价”时可适用赠与合同的规则，如果赠与条款与其他人身安排和财产安排相勾稽，不具有赠与的真实意图且不具备独立性，则不能适用合同编赠与合同的特殊规定。父母对子女的抚养义务属于法定义务，不能通过协议免除，但是离婚协议中的子女抚养条款作为夫妻对抚养义务的履行达成的合意，对双方具有合同约束力，夫妻一方未按约定支付抚养费时，另一方有权根据子女抚养条款主张违约金。离婚协议根据《民法典》第464条第2款参照适用民法典合同编规则，一方面需要将待参照适用的合同编规则的立法意旨及价值取向与身份关系协议之间的契合度进行分析，并进一步而论证其中的相似性及合理性；另一方面，从离婚协议出发，要打破整体看待离婚协议的思维惯性，注意离婚协议中各条款之间的独立性，进而分析其是否具备参照适用合同规则的空间。

Paragraph 2 of Article 464 of the Civil Code has changed the provisions of Paragraph 2 of article 2 of Contract Law, and permitted that personal relationship agreement may be subject to the provisions of Contract Book according to its nature by reference. On the one hand, this legislative change has realized the return of marriage and family law adopted in the codification of the Civil Code, on the other hand, solved the problems arising from judicial practice. As a type of identity relationship agreement involving property, divorce agreements include typical identity agreements for the dissolution of marital relationships, as well as accompanying behaviors such as property division and child rearing. The reference application of divorce agreements to contract rules is controversial in practice, and how to apply contract rules needs to be studied.Starting from identity rights, identity-related legal acts and identity relationship agreements, this paper explores the rationality and internal logic of the reference to the rules of contract for identity relationship agreements. Based on this, this paper carries out targeted discussions on specific issues arising from the practice of divorce agreement, in order to explore possible approaches on the application of the Rules of Contract Book as a reference. The divorce clause in the prenuptial agreement is a contract with conditions attached, and it is the property behavior in the divorce clause that comes into effect with conditions. As the conclusion of a prenuptial agreement is earlier than divorce, when there are changes in the objective conditions unforeseeable by the parties, reference may be made to the change of circumstances system. When determining the effectiveness of a fake divorce agreement, we should distinguish identity relationships and property relationships. The act of terminating marital status has the intention of registering divorce and is effective, however，the property relationship should be judged independently of the status behavior. When a couple divorces in order to avoid debt and damages the creditor‘s rights, the divorce agreement can be used as the exercise object of the revocation right. Sometimes, the property division clause in the divorce agreement is mistaken for a gift. In individual cases, we should adhere to the principle of substance over form, grasp the true meaning of the parties behind the gift clause. Only when the gift clause is independent of other clauses in the divorce agreement, the parties still have the gift intention, the rules of the gift contract can be applied. Parents‘ obligation to raise their children is a legal obligation and cannot be waived through agreement. However, the child support clause in the divorce agreement serves as a consensus between the couple to fulfill their child support obligations and has contractual binding force on both parties. If one party fails to pay the child support fee as agreed, the other party has the right to claim breach of contract damages based on the child support clause. If a divorce agreement wants to refer to and apply the contract rules of the Civil Code in accordance with Paragraph 2 of Article 464 of Civil Code, one the one hand, it is necessary to analyze the legislative intent and value orientation of the contract rules to be referred to and the compatibility with the identity relationship agreement, and then demonstrate the similarity and rationality of the reference application. On the other hand, starting from the divorce agreement, we need to break the mindset of viewing the divorce agreement as a whole agreement, pay attention to the independence of each clause in the divorce agreement, and then analyze whether it has the space to refer to the applicable contract rules.