Social security system is an important economic and social system. The social insurance premium rate directly relates to the scale of social security financing. The CPC Central Committee and the State Council attach great importance to improving the social insurance premium rate policy. At the Third and Fifth Plenary Sessions of the Eighteenth Central Committee of the CPC, it was proposed that the social insurance premium rate should be reduced appropriately and timely. In 2015, the State Council decided to appropriately reduce the rates of unemployment, work-related injuries and childbirth insurance. In 2016, it is proposed to reduce the proportion of basic endowment insurance units for employees in enterprises by stages. Reducing the proportion of employees' basic endowment insurance contributions will have a positive impact on enterprises and countries. On the micro level, it helps enterprises, especially small and medium-sized enterprises, to reduce their burdens; on the macro level, it helps to increase the number of employees of enterprises and reduce the unemployment rate of the whole society. At the same time, it is also conducive to the promotion of national macroeconomic development.