农民工进城务工,为解决农民就业问题、增加农民经济收入、缩小城乡居民收入差距做出了贡献。但是,农民工的社会保障仍不完善,大多数人没有参加基本医疗保险和养老保险,严重制约了农村社会经济的发展。因此,保障农民平等的发展机会和国民待遇,是全面建设小康社会的关键,也是构建社会主义和谐社会的重中之重。 Migrant workers migrate to cities and work in order to solve the employment problem of peasants, increase peasants’ economic income and narrow the income gap between urban and rural residents. However, the social security of migrant workers is still not perfect, and most people do not participate in the basic medical insurance and pension insurance, seriously restricting the social and economic development in rural areas. Therefore, ensuring peasants’ equal opportunities for development and national treatment is the key to building an overall well-to-do society and the most important factor in building a harmonious socialist society.