In order to explore the long-term variation characteristics of PM_2.5 concentrations in Handan and their potential source of pollution,the statistical analysis of the PM_2.5 concentrations obtained from online monitoring of Hebei University of Engineering site from December 2012 to February 2018 was carried out. Source analysis of PM_2.5 was performed by HYSPLIT model,potential source contribution factor method (PSCF) and concentration weight trajectory analysis (CWT). The results show that the average annual values of PM_2.5 in Handan city from 2013 to 2017 are 108.4,98.3,92.2,81.2,66.3μg·m^-3,respectively. The trend is declining year by year;the pollution is more serious in autumn and winter,followed by spring and summer;the monthly mean value of PM_2.5 is unimodal,and the highest in January (167.4μg·m^-3),The lowest value appears in July (59.2μg·m^-3). The results of the backward trajectory show that the near-surface air pollution air mass transport path is dominated by close-range trajectories,and the path with shorter trajectories accounts for more than 40%. In addition to winter, there are spiral turns in the short-distance transport path,and the trajectory direction turns to the southdirection and east-direction paths. The main pollution source areas are large,and trajectories from central central and southern Hebei,northern Henan,south-central Shanxi,north Shaanxi,and southern Inner Mongolia contribute a lot to the mass concentration of PM_2.5.