Accurate source analysis of atmospheric pollutants is of great significance to the control of atmospheric pollution in general view. However

the method of single source analysis has many drawbacks

resulting in that the characteristics of regional air pollution cannot be reflected accurately by the results of analysis. This paper takes Shenyang as the research area and uses positive definite matrix factorization model (PMF)

UNMIX and principal component analysis (PCA) method to analyze the source of PM2.5

PM10 and VOCs which is spatially and temporally different in Shenyang. The composition of various unknown pollutants was analyzed

the sources of various pollutants were determined according to the analysis results

and their contributions to air pollution were analyzed. Through the comparative analysis of the three groups of analytical results

it is found that the main sources of PM2.5 in Shenyang are secondary sources

coal-burning mixed sources and mixed dust sources

PM10 mainly comes from vehicle emission sources and mixed dust sources

and VOCs mainly come from vehicle emission sources

industrial pollution sources and mixed dust sources.