Great changes have taken place in the rural population structure of China. For instance, the proportion of rural population is decreasing;the problem of population aging is getting more and more serious; and the family size in rural area is becoming smaller. Under such circumstances, farmers are obviously exposed to risks of aging, illness and poverty. In light of the requirement to build a well-off society in an all-round way and realize the coordinated and sustainable development between economic and social in urban and rural, we must speed up the construction of social security system in rural areas, set short-term, medium-term and long-term goals, and identify social insurance as the main model for security system, and establish an overall institutional framework including rural pension system, rural medical insurance system and system for ensuring a minimum standard of living.