Utilizing the black carbon mass concentration and conventional meteorological data of the national reference climatological station in Huimin, Shandong, and GDAS data from December 2018 to November 2019, the variation characteristics and potential sources of black carbon aerosols are analyzed based on the TrajStat model. The research findings are shown below. 1) During the observation period, the average value of black carbon mass concentration is 3.22 µg • m-3, and the seasonal variation presents the characteristics of high in winter and spring, but low in summer and autumn; the high-frequency value of black carbon mass concentration in spring, summer, and autumn is under 2 µg • m-3, while above 6 µg • m-3 in winter. 2) The diurnal variation of black carbon mass concentration has a bimodal structure, of which the peak value appears from 06 : 00 to 08 : 00 and from 19 : 00 to 21 : 00 and the valley value appears from 13 : 00 to 15 : 00. 3) The black carbon mass concentration is obviously influenced by rainfall and wind . The average value of the non-rainy period is 2.8 times that of the rainy period; when the wind speed is under 3 m • s-1, the black carbon mass concentration decreases with the increase of wind speed; the air mass coming from west-southwest in winter and from due south in spring is liable to cause high pollution of black carbon mass concentration. 4) The seasonal variation of air flow is obvious in Huimin. The air flow from the surrounding areas such as the central Shandong, Hebei, and the north of Jiangsu takes a high proportion in spring, autumn, and winter, corresponding to high black carbon mass concentration; while the air flow from the ocean takes a high proportion in summer, corresponding to low black carbon mass concentration.