Abstract: The meteorological influencing factors on pollutions are analyzed by means of pollution data observed in Baishiqiao(Beijing) and meteorological data in Beijing ambientareas.The relationship between PM2.5 concen tration and air pollut ants are explored in terms of successive regression method.The samemet hod is used to in vestigate the relationship between PM 2.5 concentration and meteorological factors.Positive correlation exists in PM2.5 and SO2,NOx and negative correlation exists in PM 2.5 and O3.The analysis results indicate that SO2 and NOx concent ration basically fit the variety of PM 2.5 concentration.The relationship between PM 2.5 and air pollutants indicat es regional pollution characteristics in Beijing area.