近30年来,随着中国经济的高速增长,人们物质生活水平不断提高,但在收入增加的同时,出现了贫富差距拉大,社会人群分化日益显著的现象,不同收入人群之间的人口特征、社会心态、政治参与等方面差异化趋势愈加分明。尽管西方发达国家的社会发展经验证明,中等收入群体和中产阶级的壮大对社会稳定发展会有比较大的帮助[1],但发展中国家在工业化进程中 In the past 30 years, with the rapid economic growth in China, people’s material living standards have been continuously improved. However, while incomes have risen, there has been a widening gap between the rich and the poor and an increasingly prominent social group. Demographic characteristics among different income groups , Social mentality, political participation and other aspects of differentiation more clearly. Although the experience of social development in western developed countries proves that the growth of middle-income groups and the middle class will be of great help to the social stability and development, 1 the developing countries are in the process of industrialization