Back-trajectory analysis, CMB and Elemental tracer are all common ways of regional sources apportionment of the atmospheric particulate matter. Determining the sources by analyzing the chemical composition, but this method also has its drawbacks, such as high cost, long flow and so on. To solve the above problems,putting forward a new method to quantify the regional sources of PM10 in the city atmospheric environment. This method is based on PM10 time series of monitoring site in Changchun. Firstly, obtaining the amount of the local sources, the difference between PM10 data and local sources is regional sources. Estimating the average contribution rate of the regional sources of PM10 in six monitor sites of Changchun in 2011 by using monthly moving 30th percentile, the change trend from the north to the south is gradually decreased. Food factory site is for 38.85%, Passenger Car factory is for 28.79%, Institute of Posts and Telecommunications is for 24.31%, Children Park is for 20.89%, Jingyuetan is for 19.93%, Shuaiwanzi is for 37.35%. From which we can find that the main source of air pollution in Changchun is local pollution, in order to solve the problem of particulate air pollution in Changchun City, to improve air quality, we should pay more attention to govern the local sources pollution.