To　improve　catalytic　activity　and　sulfur　dioxide　and　water　resistance　of　the　0.25Pt/TiO2　catalyst　and　explore　the　simple　catalyst　preparation　method　suitable　for　industrial　production,　we　developed　a　0.25Pt-CoOx/TiO2　catalyst　in　the　present　work.　The　0.25Pt-CoOx/TiO2　catalyst　was　prepared　via　the　impregnation-,　precipitation-,　and　ball　milling-combined　method,　and　its　catalytic　CO　oxidation　performance　as　well　as　sulfur　dioxide　and　water　resistance　was　examined.　It　was　shown　that　the　0.25Pt-CoOx/TiO2　catalyst　exhibited　a　good　catalytic　activity　and　good　resistance　to　sulfur　dioxide　and　water.　The　T50,　T90,　and　T100　(the　temperatures　for　achieving　CO　conversions　of　50,　90,　and　100%)　over　the　0.25Pt-CoOx/TiO2　catalyst　at　a　space　velocity　of　47,872　mL/(g　h)　were　95,　110,　and　120　degrees　C,　which　were　70,　57,　and　50　degrees　C　lower　than　those　over　the　0.25Pt/TiO2　catalyst,　respectively.　Meanwhile,　CO　conversions　over　0.25Pt-CoOx/TiO2　were　maintained　at　above　99%　within　12　h　of　reaction　in　the　co-presence　of　SO2　and　H2O.　The　doping　of　CoOx　to　0.25Pt/TiO2　increased　the　surface　Co3+　species　concentration,　redox　ability,　and　acid　site　number　of　the　0.25Pt-CoOx/TiO2　catalyst,　which　favored　the　enhancements　in　catalytic　activity　and　SO2-　and　H2O-resistant　performance.　In　addition,　it　was　also　found　that　an　appropriate　amount　of　H2O　introduction　to　the　reaction　system　could　promote　the　oxidation　of　CO　and　inhibit　the　negative　effect　of　SO2　addition　on　CO　oxidation　over　0.25Pt-CoOx/TiO2,　thus　making　this　catalyst　show　good　CO　oxidation　activity　and　good　sulfur　dioxide　and　water　resistance.　We　are　sure　that　the　developed　0.25Pt-CoOx/　TiO2　catalyst　has　a　great　application　potential　in　the　removal　of　the　flue　gas　emissions　from　the　iron　and　steel　industries.