This paper firstly puts forward the relationship hypothesis between the geographical agglomeration, urban scale and haze pollution based on urban economic theory. Then, the surface concentration of PM2.5 is employed to measure the haze pollution, and China industry business performance data is used to calculate the manufacturing geographical agglomeration from the perspectives which including output, employment and capital. The dynamic impacts from geographical agglomeration and urban scale on haze pollution are investigated by a variety of regression estimations. The results show that the influence from geographical agglomeration on PM2.5 concentration shows significant characteristics of inverted U-shaped relationship. However, most cities of China are still at the stage that the haze pollution gets more serious with the increase of geographical agglomeration. Meanwhile, larger urban scale is helpful to reduce the negative impact from geographical agglomeration on haze pollution. Additionally, there exist significant differences in different regions in terms of the impacts from geographical agglomeration and urban scale on haze pollution.