Abstract: Neutral fraction in the hydrogenated rosin prepared by authors was separated from acidic fraction by modified DEAE Sephadex ion exchange chromatography and analyzed with GC MS DS technique by using DB 5 capillary column.Eighteen compounds were isolated from the neutral fraction and thirteen of them were identified. Its main components were 7 isopimarenol,8(14) pimarenol,methyl oleate,methyl 15 tetracosenoate,3,17 dihydroxy pregnane 11,20 dione,7 isopimarenal and methyl dehydroabietate etc.Seven hydrogenated diterpene components were new compounds reported for the first time.