The aromatic compounds of 28 representative China Oolong tea was studied by gas chromatography and mass spectrometry analysis. Results showed that 302 kinds of aromatic constituents in total were separated from 28 representative China Oolong tea and 176 of them were indentified which are mainly Alcohols、Terpenes、Esters、Aldehydes and Ketones. 99 kinds of aromatic constituents existed in both of tea and 77 special constituents, the former percent of the relative content is more than 95% and the latter less th...