Zhang Zhai was one of the most complete philosophers in the Confucian system of Confucianism in the Northern Song Dynasty, and the "Guan Xue School" he founded paid special attention to "the etiquette of the practice". The purpose of this paper is to explore the relationship between "evil" and "courtesy" in Zhang's theory. Zhang Zhai thought that when our people in the pursuit of moral practice, the achievement of self-nature, at this time the desire is good, but if my people fall into drowning, only to meet the body life of the pursuit of external objects, fame and interest, at this time " desire" is the source of evil of my people. If i can in each of the moments of the "courtesy" and because of people, time, earth know the gift, courtesy, courtesy and tian Daodeed contract popular, To make practical gifts in the situation of different people, in order to carry out the link of feelings of goodwill between people, and then to produce the education of the people's feelings, regulate the social work of the industry.