In order to establish fl new method for making cellulose and lignin from Masson pine,fl high boiling solvent(HBS)pulping process with an aqueous solvent of 1,4-butanediol was investigated.Masson pine chips were pulped with fl 70%-90% aqueous solution of 1,4-butanediol containing fl small amount of fl catalyst at 200- 220 ℃ for 6O一18O min.HBS M a~son pine cellulose is suitable for m aking paper. ater-insoluble HBS lignin was separated from the liquor reaction mixture by water precipitation.The recovered high boiling solvent(RHBS)is able to be recycled as fl pulping solvent,indicating that the HBS method is fl pulping process of M asson pine which is energy saving,resources saving and pollution free．HBS lignin has fl better chemical reactivity and fl lower ash content than lignin sulfonate.