Abstract:The constitutents of essential oil in two kinds of Myrrha were analyzed by GC-MS. Fifteen compoundsin Myrrh and thirty-three compounds in Gum opoponax were identified with their percent contents given.The mainconstituent of Myrrh is furanoeudesma-1, 3-diene, and the main constituent of Gum opoponax is β-trans-ocimene.