The chemical components of volatile oils of Zanthoxylum bungeagum Maxim prepared through simultaneous distillation and solvent extraction (SDE) were determined qualitatively and quantitatively by gas chromatograph mass spectrometry computer.56 of the 80 components separated from the extraction have been identified,accounting for 95.99% of the total of the volatile oils.52 components are proved to be terpene,containing insecticidal constituents:beta phel landrene 23.12%,linalool 3.51%.This indicates that...