Abstract: Based on measurements from a ground-based CE318 solar photometer in Pengzhou area of Chengdu in 2017,aerosol optical depth (AOD),Angström exponent (α),and atmospheric turbidity (β) were retrieved and their correlations with the inhalable particulate matters (PM₁₀ and PM_2.5) were studied.The results show that the seasonal mean AOD is largest in winter,followed by spring,summer,and autumn.The large AOD values usually occur in winter and spring,and the lower values mostly occur in summer and autumn.The α values vary in a small range throughout the whole year with a monthly average of 1.22±0.19 and are low in spring and high in summer.The monthly variation of AOD is similar to that of α in all seasons except for winter.The AOD has a strong correlation with β and weak positive correlation with PM₁₀ and PM_2.5.Aerosol optical property in this area is not greatly affected by dust particles from the north but is significantly influenced by human activities.The primary aerosol type in this region is the urban-industrial aerosols dominated by fine particles.