Abstract: Political participation is the core component of modern democratic society, and it is the most important form of Civil-political interaction and expression of democracy. Based on the 2015 China General Social Survey（CGSS2015）Data, this paper uses Logitstic regression model to analyze the impact on citizens' political participation, which including the socio-economic status (including socio-economic status perception and social class identity) and the sense of social justice. The results show that citizens' social class identity significantly affects political participation behavior. The higher the citizen's sense of identity with his social class, the more likely his political participation is. However, the perception of citizens' socio-economic status has little effect on political participation. In terms of social justice, the fairer the society perceived by citizens, the higher the possibility of political participation. In other words, the social justice has a positive impact on political participation.

Key words: political participation, the sense of social justice, socio-economic status perception, social class identity