Costume is taken as a carrier for a long time, by carrying the culture, customs, political and economic situation of a society, and reflecting the control of the mechanisms of power to people's ideology. In every society, the controlling of power to men's behavior and even thinking is expressed as the control of human body, for example the bound feet in the feudal society in China and the corset in the west, etc. People yield to these mechanisms and then dress themselves according to the social rules at that time. Therefore, the ideal body image changes with the development of the society.This paper takes foot-binding and corset as the study objects, discussing the reasons for the appearance of the two "fashions in Deformity"?foot-binding and corset, analyzing how one demises and how another continues to exist. This study will deepen people's understanding about deformed fashion in costume history, and let people treat these phenomenons more rationally. The conclusion of this paper, according to the social background, is that foot-binding is not an independent occurrence but has a close relationship with the philosophical Confucianism and the aesthetic standards with rich political complexion. The bound foot reflects women's sexual repression imposed by the patriarchal society and gradually becomes the new sexual organ of woman according to the traditional ancient Chinese standards of aesthetics. Similarly, corset also reflects a kind of way to control woman's body in the patriarchal society which shows that the worship to woman's bearing and the appreciation of a young woman's body reaches an extreme degree. At the end, this paper compares the reasons for the decline of foot-binding and corset and concludes that the original purpose for developing costumes is to highlight sexual desire. And it is always the core element in directing the development of costumes, and costumes will determine the expressing way of sexual desire by decorating the body. The ends of two deformed body that among the social forces shaping the two kinds of sexual figures, power determines the aesthetic standards of the society and the demise of the old fashion comes after the birth of the new aesthetic standards conforming to the new power.