Abstract: The atmosphere particulate matter characteristics over the city of Anqing(Southwestern Anhui Province, China) between 2015 and 2016 were analyzed in this study. HYSPLIT4 backward trajectory model was used to simulated the air pollutions transport patterns and potential source area. The results showed:(1) The particulate matter concentrations had significantly seasonal changes, which was high in winter and low in summer. The highest and lowest particulate matter concentrations appeared in December and July, respectively.(2) The airmass trajectory in Anqing area exhibited significant seasonal variation. In the summer, Anqing is dominated by oceanic airflow from the southern and the southeastern regions. In the other seasons, the Anqing area is affected by the oceanic airmass and the continental airmass. The continental airmasses could be divided into the western and northwest path, commonly corresponding with heavy air pollution events in Anqing.(3) The PSCF and CWT values were also higher in winter but lower in summer. High PSFC and CWT values airmass mainly from two stripe areas, one area involved the eastern Hubei, northern Jiangxi and southern Hunan province, another one included the Shanxi, Henan, Shandong and northern Anhui province.