Osmanthus fragrans Lour. is not only a kind of ornamental flower but also have dietary and medicinal values. It is widely used in food industry and chemical industry. Solid phase microextraction (SMPE), microwave radiation and simultaneous distillation extraction (ME-SDE) and supercritical CO_2 extraction were applied to extract the Osmanthus essential oil in this paper. The compounds and the relative contents of essential oil were analysised by GC/MS, and the compounds of essential oil were compared to the...