Abstract: In this article, a method is developed to determine the terpene components in the essential oil of cedarwood,with HP- 5MS crossed silicon capillary column, and the temperature program: 120 ℃ 2 ℃/ min 200 ℃. The resul tsshow cedrene at 60. 57% , alpha-cubebene at 2.12%, and thujopsene at 14.21%.

Key words: CGC, essential oil of cedarwood, terpene components