Abstract: The formation of urban haze pollution is not only related to the emission of urban air pollutants, but also may be affected by the fluctuation of urban surface, urban architectural form and even urban scale. Therefore, it is of great significance to judge the influence of urban surface elements on haze pollution for the treatment of urban haze pollution. The daily average concentration of PM_2.5 are collected from 13 cities in Beijing-Tianjin-Hebei region from 2014 to 2017, and the regression analysis of daily average concentration of PM_2.5 is carried out from the perspective of terrain slope, urban form and urban scale. The results show that: in the urban area of Beijing-Tianjin-Hebei the surface fluctuation, especially the surface roughness can better explain the PM_2.5 concentration, and the influence direction is negative. City size does not have a great impact on PM_2.5 concentration, and the urban morphology can not explain the PM_2.5 concentration.