Abstract: The paper established Spatial Durbin Model to estimate the impact of service industry agglomeration on the quality of economic growth. The result indicates that diversified agglomeration of service industry improved the growth quality of economy, but the role of enterprise competition and specialized agglomeration was not significant. Furthermore, a robust test was processed from perspectives of spatial weight matrices and dummy variables, the result presents that the agglomeration of service industry had a positive effect on not only itself but also the adjacent regions. Enterprise competition, in contrast, played a negative role. Additionally, the east had the advantage in terms of location. Ultimately, because of the oversize of sample space, the article successively estimates the spatial spillover centering on the provincial capital and forming the distance belt by accumulation for every 20 or 10 kilometers. The estimate shows that the spatial spillover of service industrial agglomeration is positive with the exist of space boundary.