This paper discusses the aesthetic value of catharsis in dance performances, focusing on Aristotle's theory of catharsis. The conclusion is as follows. First, catharsis as an aesthetic ideal that arises through emotional connection with the audience is an axis of aesthetic sense and aesthetic category, and performs overall aesthetic activity in dance performances. Second, catharsis in dance transcends the emotions of the audience through appreciation, eruption and purification of emotions, based on ethics and social utility that further solidify aesthetic values. Third, the heightened emotions of the audience regain peace while experiencing catharsis and form a virtuous cycle of social moral ethics. Fourth, catharsis has the ideal function of moral thinking by controlling and restraining inner emotions by purifying the mind and emotions of the audience with the effect of psychotherapy in dance performance activities.