Abstract: Sample of bark of Toona sinensis was extracted with ethanol and purified by passing through silica gel column. The fat-soluble components in the eluant were separated and identified by GC-MS, and their relative contents (in %) were found by the method of normalization. Totally 41 compounds were identified and determined, amounting to 91.99% of the total peak areas of the fat-soluble components. The main compounds found with their relative contents were as follows: terpenoids (36.58%), alkanes (31.70%) and fatty acid (21.95%).