Abstract: Exploring the influence and mechanism of government public service supply and haze control will help provide new insights for optimizing government's public service function and enhancing the construction of ecological civilization. This essay explores the channel through which public service supply affects environmental pollution via technological process, industrial structure and income level by constructing an endogenous growth model. Based on the theoretical analysis, we investigate the impact of public service supply on haze pollution and examine the mediation effect using city-level panel data from 2005 to 2016. The results show that public service supply significant inhibits haze pollution. Compared with small and median cities, large cities exhibit a stronger reduction effect. Also, the effect of public services for infrastructure is larger than that of people’s livelihoods. Further, there exhibit regional and period differences in the haze control effect of public service supply. Public service supply affects urban haze pollution through the channels of technological progress, industrial structure and income level. On the one hand, public service supply can inhibit haze pollution by promoting technological progress and income levels. On the other hand, it can intensify haze pollution by increasing the proportion of industry. Our results broader the theoretical study of public service supply on environmental pollution, thus providing instructions for optimizing public service supply layout and promoting urban green development.