V2O5-WO3(MoO3)/TiO2　catalysts　are　widely　used　in　industrial　denitrification　(deNO(x))　processes　based　on　the　selective　catalytic　reduction　(SCR)　technique.　To　lower　their　cost　and　shorten　the　production　cycle,　V2O5-MoO3/TiO2　catalysts　with　and　without　CeO2　modification　were　prepared　using　the　ball　milling　method.　This　study　demonstrates　that　the　CeO2-modified　catalyst　has　high　NO　conversion　and　a　broader　temperature　window　due　to　the　decreased　amount　of　easily　reducible　vanadium　species　and　the　enhanced　property　of　oxygen　species　activation　in　CeO2.　Meanwhile,　the　SO2　resistance　of　the　catalyst　is　restrained　due　to　the　strong　adsorption　and　oxidation　of　SO2　over　CeO2　in　the　catalyst.