This study uses structured questionnaire to survey the new generation employees in Wuhan, Shenzhen, Nanjing enterprise, and analyzes the relationship between LMXSC (the comparison between one’s own LMX and that of coworkers) and employees’ career success as well as the moderating effect of member’s collectivism. The results show that: in the control of demographic variables like sex and one’s own LMX, LMXSC (subjective assessments of one’s relative LMX standing, LMXSC) has significant and positive effect on subordinates’ career success; the higher the LMXSC is, the more self-efficacy one will get, meanwhile, subordinates receiving leaders’ trust feel obliged to reciprocate with increasing job involvement, which helps them achieve career success; job involvement plays a partial mediating role in the relationship of LMXSC and career success; compared with the old, the employees of the millennial generation show more obvious signs of individualism, which will offset the role of collectivistic orientation in traditional culture, so the moderated and moderating effect of collectivism is not significant.