Either on the properties or on the function, family law is unique in character. Different from general property relations, however, matrimonial property relations is based on the identity. So it differs from the property relations in properties and applicable rules. If kinship legislation and judicial interpretation ignore that, it will definitely lead to its opposite. As a result, it leads to the alienation between the family law and the adjustment of the legal relationship, making family law unreasonable, even producing negative energy. To avoid and guard against the alienation between law and legal relationship and to spur people to agree with the law and eliminate the sense of alienation, we take some efforts and some academic plays. Only if combined the theoretical study with the study that how people form believes and how people take actions according to the belief, can the alienation of the law be avoided.