Reducing　emissions　of　volatile　organic　compounds　(VOCs)　is　an　integral　part　of　improving　the　quality　of　the　atmospheric　environment.　Catalytic　oxidation　has　become　an　effective　means　of　treating　low　and　medium　concentration　VOCs　exhausts　due　to　its　advantages　in　terms　of　removal　efficiency,　energy　saving　and　environmental　protection.　Due　to　the　unique　inherent　properties　of　supported　precious　metal　catalysts,　they　show　good　catalytic　efficiency　in　VOCs　emission　reduction.　In　this　study,　the　mesoporous　Si-WO　3　support　was　first　synthesized　by　the　P123-assisted　sol　-gel　method,　and　the　x　Pt/Si-WO　3　catalysts　with　the　actual　loadings　(　x　=　0.19,　0.48,　and　0.81　wt%)　of　Pt　nanoparticles　(NPs)　were　then　obtained,　physicochemical　properties　of　these　materials　were　characterized　using　a　variety　of　techniques,　and　their　catalytic　activities　and　water　resistance　for　the　oxidation　of　toluene　were　evaluated.　The　results　showed　that　Pt　NPs　with　an　average　particle　size　of　2.3-3.3　nm　were　highly　dispersed　on　the　mesoporous　Si-WO　3　support,　and　the　0.81Pt/Si-WO　3　sample　exhibited　the　highest　catalytic　activity　for　toluene　oxidation　at　a　space　velocity　of　20,000　mL/(g　h)　(　T　50%　=　167　degrees　C　and　T　90%　=　180　degrees　C;　specific　reaction　rate　at　160　degrees　C　=　8.54　mu　mol/(g　Pt　s),　turnover　frequency　(TOF　Pt　)　at　160　degrees　C　=　1.67　x　10　-　3　s　-　1　,　and　apparent　activation　energy　=　45　kJ/mol).　The　good　catalytic　performance　of　0.81Pt/Si-WO　3　was　associated　with　its　large　surface　area,　well　dispersed　Pt　NPs,　high　adsorbed　oxygen　species　concentration,　large　toluene　adsorption　capacity,　and　strong　interaction　between　Pt　NPs　and　mesoporous　Si-WO　3　.　The　0.81Pt/Si-WO　3　sample　possessed　excellent　water　resistance,　and　the　introduction　of　5　vol%　or　10　vol%　water　vapor　to　the　reaction　system　enhanced　toluene　oxidation　since　part　of　water　vapor　participated　in　the　oxidation　of　toluene.　In　addition,　the　toluene　oxidation　pathway　might　obey　the　sequence　of　(adsorbed　toluene　+　adsorbed　oxygen　species)　-*　benzyl　alcohol　-*　(benzoic　acid　and　benzaldehyde)　-*　maleic　anhydride　-*　(carbon　dioxide　and　water).