Abstract: Daxue is an important Confucian literature.CHEN Hao and CHEN Yi were the founders of Song Dynasty Confucianism,they commended Daxue and studied its concept,category,ideology,which composed an important part of their theory,thus they have made great contribution in Confucian history.Since then,many scholars praise their achievements.Especially,ZHU xi has made more contribution on the basic of the two brothers and made Daxue more classic in Confucian literature.