The essay gives priority to analyze the function of penetrating emotion of the dancer to increase the beauty of the dance itself on the basis of discussing the connotation of dance expression and the beauty of dance. It also proposes three notes which can enhance the effect of dancing emotion. Firstly，it is to pay attention to the experience of life and build up a stable foundation of feeling. Secondly，mastering the performing skills and expressing the emotion of works exactly are needed. Thirdly，it is very important to rely on the aesthetic effect created by outside scenes.