Based on the difference in precipitation between the station over the Yellow Mountain and those in Huangshan District, Jixi and Huangshan city, which is defined as the orographic enhancement factor(R₀), as well as the change of visibility during 1960 and 2009, the possible ways that air pollution aerosols influenced orographic precipitation were studied.During 1960 and 1979, the increasing trend of R₀ matched well with the decreasing visibility and increasing aerosols.Different stations presented different change trends for R₀ while the visibility was increasing and aerosol was decreasing during 1980 and 1989.With decreasing visibility and increasing aerosols, R₀ decreased significantly during 1990 and 2009.The effect of aerosols on the orographic precipitation was relevant with background concentration of aerosols.When the background concentration of aerosols was low, increasing aerosols would promote orographic precipitation.When the background concentration of aerosols was high, air pollution aerosols would suppress orographic precipitation significantly and the corresponding visibility threshold was about 10 km.When the aerosols suppressed orographic precipitation, the inhibition effect was negatively correlated with the wind speed and positively correlated with wind frequency and average precipitation in each wind direction.