[Objective] The study was to increase the oil yielding rate of perilla seed.[Method] The methods of mechanical compression,chemical extraction,soxhlet extraction and supercritical CO2 extraction were taken to extract the oil in perilla seed.With oil yielding rate of perilla seed after extraction as investigation index,the suitable extraction method for oil in perilla seed was screened.[Result] The oil yielding rates with the method of mechanical compression,chemical extraction,soxhlet extraction and supercr...