Abstract: The fatsoluble components were extracted by diethyl ether anhydrous and identified by GCMS and to determine the relative percentage with area normalization.Twentythree components were identified,which were composed of 89.396% of the total detected constituents from the Beaumontia grandiflora leaves.The major constituents were identified as Squalene(17.674%),Lupeol(11.826%),Neophytadiene(10.351%),Dotriacontane(8.348%),Cycloartenol(7.685%).Twentysevent components were identified,which were composed of 90.611% of the total detected constituents from the Beaumontia grandiflora branches.The major constituents were identified as Lupeol(37.702%),Cycloartenol(10.583%),Cycloeucalenol(6.486%),Clionasterol(4.847%),Ergosta8,24(28)dien3ol14methyl(4156%).

Key words: Beaumontia grandiflora Wall., GCMS, fatsoluble