“礼经三百,威仪三千”是孔子论礼的重要命题,它讨论的是学习礼经书本和践行礼容威仪之间的辩证关系,而贯穿其中的则是君子的品德修养问题。经过七十子及其后学的不断阐释,该命题的文本面貌与微言大义均发生变化,并对汉初今文礼学思想分化产生了深远影响。西汉末,刘歆对该命题加以利用,在《七略》礼类小序中将“礼经”概念由《仪礼》改换成《周礼》,郑玄、孔颖达相继坐实,终成学术史上一段公案。 “Etiquette three hundred, dominance three thousand ” is an important proposition of Confucian etiquette, it discusses the study of the Book of Liaojing and practice liban dialectical relationship between, but throughout the gentleman is the moral accomplishment problem. After the explanation of seventy sons and later studies, both the textual appearance and the micro-righteousness of the proposition have been changed, which have a profound impact on the ideological division of present-day rituals in early Han Dynasty. At the end of the Western Han Dynasty, Liu Xin made use of this proposition by changing the concept of “Etiquette” from “Ceremony” to “Zhou Ceremony” in the sequence of “Seven Lips” ceremonies. Zheng Xuan and Kong Ying Da Into the academic history of a public case.