In 2016，in order to lessen enterprises' burden especially under the circumstances that economic development was facing pressure，China introduced the policy of temporary decrease on social insurance contribution rates.In general，social insurance system has run well，with more people covered，the scale of fund income and expenditure enlarged，and social insurance reforming policies implemented and great achievements made.Meanwhile，social insurance still has design and operational problems.In future，with social and economic development，and information technologies progress，social insurance is facing challenges as well as opportunities.It is suggested that according to the requirements of the “13th Five-year”Plan，continuous efforts should be made to deepen all-around reforming concerning social insurance items to promote more fair and sustainable development of social insurance system.