The image of "unnecessary men" firstly emerged in 19th century Russia. It has aroused extensive attention since the date of its birth. This paper aims at embodying the causes and process of development and relative characteristics of representative figures in Russian and Chinese literature. Researchers usually refer to the typical representatives of "unnecessary men" in Russian literature as the heroes of «Eugene Onegin» by A. S. Pushkin, «Hero of our time» by M. Yu. Lermontov, «Oblomov» by I. A. Goncharov, etc. "Unnecessary men" in Chinese Literature -- Juan Sheng, Jue Xin, Xiao Jianqiu, etc. As an epitome of their era, they are among the leading elites grown up from the old norms. They are the inevitable products of the era with profound significance. They tragedy, no matter to the society or individual is filled with warming and enlightenment. Its significance is extensive and profound and is well-worth researing and exploring.