The effects of epichlorohydrin amount, reaction temperature and reaction time on epoxy value of bagasse cellulose were investigated. Result showed that the epoxy value reached the highest when epichlorohydrin amount-bagasse cellulose ratio, reaction temperature and reaction time were 4:1 (V/m), 50 ℃ and 5 hours, respectively. At the same time, the modified bagasse cellulose had a better adsorption on molasses, with the decoloration rate being of 25.59%.