Aseries　of　V-Mo　/　TiO2　catalysts　were　prepared　by　the　impregnation　method.　The　influence　of　crystal　structure　(rutile　phase,　anatase　phase　and　the　mixed　phase　of　the　two　phases)　and　the　average　particle　size　of　the　TiO2　support　on　NH3　-SCR　performance　of　catalyst　were　mainly　investigated.　The　physical　and　chemical　properties　and　structure　of　the　catalyst　were　characterized　by　SEM,　XRD,Raman,　BET,　H2-TPR,　NH3-TPD　and　other　methods.　The　results　show　that　the　catalyst　with　smaller　average　particle　size　has　a　high　specific　surface　area　and　pore　volume,　which　is　beneficial　to　the　loading　and　deposition　of　the　active　component　VOx,　giving　improvement　of　the　denitration　performance　of　the　catalyst.　The　V-Mo/　Ti-A1　catalyst　with　anatase　crystal　support　has　the　best　NH3-SCR　performance　due　to　its　excellent　specific　surface　area,　redox　capacity　and　abundant　acid　sites.　At　the　same　time,　the　activity　of　the　mixed　crystal　support　V-Mo/　Ti-P25　catalyst　is　close　to　100%　in　the　temperature　range　of　180—320　℃.　©　2023　Cailiao　Daobaoshe/　Materials　Review.　All　rights　reserved.