The results indicated that the values for the oil content and the fatty acid compositions of supercritical and of hexane extracts are of agreement with the reported data . The global extraction yield would be increased with pressure increased,but the particle size had little influence on the global extraction yield. The maximum oil extraction recovery was 99.1%, which was obtained when cold pressed extraction followed by supercritical extraction at 400 bar and 60 ◦C was employed.