The supercritical carbon dioxide extraction process combined with microwave pretreatment for efficiently extracting high quality camellia seed oil was investigated. Orthogonal test was used to determine the optimal conditions of microwave pretreatment. The optimum process parameters obtained were as follows=camellia seed flour with moisture content 7.8% and through a 100 mesh sieve was treated by microwave for 120s. Then the supercritical carbon dioxide extraction process was optimized by response surface methodology. The optimum process parameters obtained were extracting for 2h at 33MPa and ...