Cinnamomum camphora is one of the important economic trees in China. The essential oil is obtained from its leaves, branches, trunks and roots. Total 164 trees were selected in Jiangxi Province. Different organs of each tree were collected and steam-distilled. 363 essential oil samples were analysed and quantitated for their constituents by gas chromatography. By means of GC, GC/MS/DS, IR and other chemical methods, 34 chemical compounds were identified. Cinnamomum camphora could be divided as following chemical types (physiological-types) by the major compounds of their leaf oils: camphor-type; linalool-type; cineol-type; isonerolidol-type; and borneol-type