“七出三不去”最初只是礼制的一项内容，后　入律，成为中国封建社会颇具特色的一项离婚制度。唐代“七出三不去”法在内容与顺序上　都与礼制有所不同，这种变动一方面反映了家族主义对法律的进一步渗透，同时也代表着唐　代立法技术的进步，表明立法者已注意到了礼制与法律不同的适用范围和不同的功能，这种　合理的区分有助于法律趋向合理化和世俗化，更能反映和适应社会的本质和需要。 “Going forward after all things go wrong” was originally only a part of the ritual system. Later it became a divorce system characteristic of the feudal society in China. The “seven out of three not to go” method in the Tang Dynasty differs from the etiquette in content and order. On the one hand, this change reflects the further infiltration of the law by the nationalism and the progress of legislative technology in the Tang Dynasty, Legislators have noticed the different scopes and different functions of etiquette and law. Such reasonable distinction helps to rationalize and secularize the law and reflect and adapt to the essence and needs of society.