In　order　to　improve　the　CO　catalytic　oxidation　performance　of　a　Pt/TiO2　catalyst,　a　series　of　Pt/TiO2　catalysts　were　prepared　via　an　impregnation　method　in　this　study,　and　various　characterization　methods　were　used　to　explore　the　effect　of　TiO2　calcination　pretreatment　on　the　CO　catalytic　oxidation　performance　of　the　catalysts.　The　results　revealed　that　Pt/TiO2　(700　degrees　C)　prepared　by　TiO2　after　calcination　pretreatment　at　700　degrees　C　exhibits　a　superior　CO　oxidation　activity　at　low　temperatures.　After　calcination　pretreatment,　the　catalyst　exhibited　a　suitable　specific　surface　area　and　pore　structure,　which　is　beneficial　to　the　diffusion　of　reactants　and　reaction　products.　At　the　same　time,　the　proportion　of　adsorbed　oxygen　on　the　catalyst　surface　was　increased,　which　promoted　the　oxidation　of　CO.　After　calcination　pretreatment,　the　adsorption　capacity　of　the　catalyst　for　CO　and　CO2　decreased,　which　was　beneficial　for　the　simultaneous　inhibition　of　the　CO　self-poisoning　of　Pt　sites.　In　addition,　the　Pt　species　exhibited　a　higher　degree　of　dispersion　and　a　smaller　particle　size,　thereby　increasing　the　CO　oxidation　activity　of　the　Pt/TiO2　(700　degrees　C)　catalyst.