Green barks and young needles of Taxus y unnanensis Cheng et L .K .Fu from different localities of Yunnan Province were analysed for taxol and other 4 taxane diterpenoids by HP LC. The average content of taxol in T .yunnanensis is 0.0081% in the dry barks. No obviously different taxol content is present in male or female plants .The taxol content in bark of wide diame tertrunk is higher .The content of other 4 taxane diterpenoids (baccatin- Ⅲ , taxuyunnanine A , 10-deacetyltaxuy unnanine A , 10-deacety lcephalomannine)is low .