:“一准乎礼”是唐律的鲜明特征。它的形成既有深刻的社会原因 ,又有深厚的文化根源。唐律的制定以礼为指导原则 ;唐律的条文大多源出于礼 ;唐律的实施在很大程度上为礼左右。以礼入法在唐代达到了相当成熟的程度。对“一准乎礼”不能拘泥 ,必须有正确的认识。 : “A standard gift ceremony” is a distinctive feature of the Tang law. Its formation has both profound social causes and profound cultural roots. The development of Tang law takes the courtesy as the guiding principle; most of the articles of the Tang law come from the ceremony; and the implementation of the Tang law is largely a ceremony. In the Tang Dynasty to the law reached a very mature level. We must have a correct understanding of “no punishments”.