Abstract: Using the panel data of 11 provinces (municipalities) in the Yangtze River economic belt from 2004 to 2018, this paper analyzes the impact of service industry agglomeration on new urbanization based on spatial econometric model. The results show that: (1) the agglomeration of service industry in the Yangtze River economic belt has significant spatial dependence.（2) The improvement of service industry agglomeration level can effectively promote the process of new urbanization in the Yangtze River economic belt, and produce a significant spatial spillover effect, which shows that service industry agglomeration can not only improve the level of new urbanization in the province, but also drive the development of new urbanization in adjacent areas.（3) Excessive government intervention is not conducive to the construction of new urbanization in this region; The improvement of the level of opening to the outside world can promote the construction of new urbanization in the region.