Abstract: GC/MS has been used to test the chemical components of essential oil of the perfume plants of Valeriana such as Valeriana pseudofficinais C.Y.Cheng et H.B.Cheng,V.faurieri Briq and V.steeenoptena in the areas of Xiang-e-yu-qian.The conclusion has been drawn that the essential oil of perfume plants is of high content of main chemical components and of effective components. The three kinds of Valeriana plants are excellent ones.

Key words: Valeriana, the compenents of essential oil, GC/MS/DS testing