As the foundation of the modernization of national governance, municipal social governance is a key point of local governance. Promoting the modernization of municipal social governance has become an important part of the modernization of national governance and social governance. There are still many shortcomings in current municipal social governance, such as the immature theory of municipal social governance in the new era, imperfect governance mechanisms, continuous social conflicts and so on. So we must adhere to the leadership of the party, base ourselves on the people, innovate governance methods, build smart cities and so on. In this way, the goal of modernization of municipal social governance will be realized and the overall development of the modernization of the national governance system will be promoted.