Abstract: The new urbanization is an important strategy of governing the country to realize the comprehensive well-off society in a period of time in the future,. This paper analyzes the legitimacy logic and valid logic of new urbanization. The source of the legitimacy of the new urbanization is to improve the unreasonable social structure, get rid of the separation of urban and rural system, and build a well-off society. People-oriented is a new meaning of the new urbanization and the urban and rural residents having a sense of gaining are the core of the legitimacy of the new urbanization,and active urbanization is a broad social foundation of the new urbanization. At the same time, the local government is no longer the“scientific planners of the new urbanization, the allocation of resources is the core of the equal opportunity of the availability of the new urbanization, rational mechanism is an important guarantee for the availability of the new urbanization. The conclusion of this paper is that the availability of the accumulation of legitimacy is the path choice of the new urbanization sustainable future.