Abstract: Social structure is not only the starting point of analysis and understanding plenty of social phenomena,but a traditional perspective of analysis of issues of economical and social development.Profound changes of social structure require bringing analysis of social structure into the scope of solving the thorny problems again.Profound changes of social structure in China's today produce important influence upon economical development,social progress and deepening political restructuring.Analyzing them is helpful to adjusting social structure and advancing social stability and harmony.