Social security system have great significance in improving peoples life,ensuring financial security and maintaining social stability in one country.For China,social security system has been developing and improving a lot for the past 30 years.However,as economic development and the improvement of peoples living standards,new problems and risks are emerging which we should pay great attention to.This literature review makes a statement of the importance of research on social security system in China and informs present research situation on social security risk and social security informatization of domestic scholars.Besides,it also points out the inadequate of previous studies and possible research tendency in future.