The social security system is the socio-economic development and progress of the product of the modern state is one of the important symbols of civilization.According to the law establishing a social security legal system has been regarded as the world's political life and an important part of building social system elements.So far,the world has more than 160 countries and regions,the establishment of the social security system.From the beginning of the founding of our country began to concern the issue of social security and economic development of the state to be established in the major decisions of the system.However,China's social security system is very imperfect,and economic development to meet the current situation,therefore,the establishment of a scientific and comprehensive legal system of social security,a social security system framework of the market economy a pillar of Construction,is of great practical significance.This paper from China's social security presence at this stage of the problem,its importance,should adhere to the principles and legislative perspective on how to improve the social security in China's legal system and why it is necessary to improve the legal system.