Abstract:Studies have shown that there is a certain connection between the serious near-surface air pollution in East Asia and the Upper jet stream. Based on the NCEP/NCAR daily wind field, vertical velocity data, and ground pollutant and meteorological element data from Science Data Bank, this paper uses statistical analysis to preliminary explore the relationship and mechanism between the East Asian jet streams and the high-concentration air pollutants near the ground in the winter. The results show that the concentrations of particulate matter in the North China Plain is much higher in the winter of 2013-2018. The average concentrations of PM2.5 and PM10 in the North China Plain were 80.65μg/m3 and 118.62μg/m3 and the number of days exceeding the environmental standards reached 459 and 489 days in all, respectively. During this period, the concentration of particulate matter showed a slow downward trend year by year, and the average PM2.5/PM10 was about 0.65, and this ratio remained stable for many years. the concentration of air pollutants in the North China Plain has a significant relationship with the intensity of the East Asian polar front jet, and they may be related by ground temperature and meridional wind. When the strength of the polar front jet is weakened, the surface temperature decrease and the ground meridional wind weaken in the North China Plain, so that the PM10 concentration in the central part of the North China Plain and the PM2.5 concentration in the northern part of the North China Plain are both lower; when the strength of the polar front jet increases, the surface temperature rise and meridional wind strengthen, which possibly lead to higher concentration of PM10 in the middle part of the North China Plain and PM2.5 in the north part of the North China Plain .