Abstract: The poly(BMA)graftedcellulose copolymer was synthesized with the aim of producing cellulose based oil absorption resins from butyl methacrylate modified cotton pulp（cellulose） by suspension graft copolymerization using glycolpropane diacrylate as crosslinker. The structure of the graft copolymer was characterized by means of FT-IR, XRD, SEM, TG, DSC, etc. The effects of reaction conditions, such as kinds and amounts of initiator, weight ratio of monomer and crosslinker , reaction temperature, reaction time etc,on the graft copolymerization and oil pickup ability of the poly(BMA)graftedcellulose copolymer were examined.The optimized reaction conditions for the synthesis of celluloseBMA graft copolymer were : m(Cotton pulp)∶m(K2S2O8 initiator)∶m (Butyl methacrylate graft monomer)∶m(Glycolpropane diacrylate crosslinker)= 1∶0.025∶1.5∶0.005，75 ℃，and 6 h. Under the above conditions, the graft yield reached 36.2%, homopolymer content was 5.8%, and oil pickup abilities were choiced.