Sb-V2O5-TiO2　catalysts　were　prepared　by　wet　impregnation　method.　The　effect　of　antimony　loadings　and　calcination　temperatures　on　the　activity　of　catalysts　were　investigated　on　the　basis　of　3%V2O5-TiO2.　The　results　indicate　that　the　catalyst　with　11%　Sb　loading,　calcined　at　500,　has　the　best　activity　of　SCR.　The　NOx　conversion　could　reach　92%　at　170　with　the　inlet　NOx　concentration　of　0.07%,　the　O2　volume　fraction　of　5%,　and　the　space　velocity　of　27　000　h-1.　The　H2-TPR　data　reveal　that　the　increase　of　activity　can　be　attributed　to　the　promotion　of　the　catalyst　oxidation　ability　by　the　modifying　of　antimony.　Sb　is　mainly　in　the　pentavalent　antimony　form　on　the　surface　of　the　catalyst,　and　the　increase　in　surface　acidity　of　the　catalyst　is　identified　by　means　of　XPS　and　NH3-TPD.　The　effects　of　SO2　and　H2O　on　the　catalyst　is　also　studied,　showing　that　the　Sb-V2O5-TiO2　has　an　excellent　catalytic　activity　in　the　presence　of　H2O　and　SO2.　FT-IR,　TG　and　pore　structure　test　results　suggest　that　the　addition　of　Sb　can　effectively　inhibit　the　aggregation　of　ammonium　sulfate　on　the　catalyst　surface,　thereby　improving　the　service　life　of　the　catalyst.　©　2017,　Science　Press.　All　right　reserved.