Abstract: The research progress of off-line and on-line analysis technology in chemical compositions analysis of atmospheric particles are discussed. The sampling technology and sample pretreatment technology of atmospheric particulates are compared.The off-line analysis technology，including atomic absorption spectrometry （AAS ），inductively coupled plasma mass spectrometry（ICP-MS），X-ray fluorescence spectrometer（XRF ），ion chromatography（IC ），gas chromatography-masss pectrometry （GC-MS），thermal optical carbonanalyzer（TOT/TOR）are discussed deeply. The developing tendency of on-line analysis technology in chemical compositions analysis of at mospheric particulates is forecasted. The on-line analysis technology including water-soluble ions，OC/EC ，chemical composition，particle mass concentration ，single particle feature monitoring are also expounded. The research provides a scientific basis for chemical compositions analysis of at mospheric particles and controlling of mist.

Key words: atmosphericparticles, chemicalcomposition, off-lineanalysis, on-lineanalysis