The Covid-19 has greatly changed China and the world. From the perspective of social construction，the important strategic achievements of China’s epidemic prevention and control have benefited from the achievements of social system reform and development over the years. However，the epidemic prevention and control also exposed the shortcomings and weaknesses in the social field. Therefore，we should take this epidemic prevention and control as an opportunity to further summarize the experience and shortcomings of social system reform. In the face of new situations and challenges，we should make great efforts to turn crisis into opportunity，break through and innovate in the key fundamental major reform of social system，continuously optimize the way of people’s livelihood security and social governance，and strive to build a society with Chinese characteristics featuring vitality and order，fairness and efficiency，Chinese civilization and the world’s excellent civilization System.