In　view　of　the　high　content　of　amorphous　silicon　in　the　rice　husk　ash　of　agricultural　waste,　this　paper　used　the　rice　husk　ash　as　the　raw　material　to　prepare　the　denitrification　catalytic　materials　with　the　TiO2-SiO2　composites　as　the　carrier　and　the　manganese,　cerium　as　the　active　component.　The　influence　of　SiO2　addition　on　the　microstructure　of　catalytic　materials　was　investigated,　and　the　denitrification　mechanism　of　catalytic　materials　with　different　silicon　content　was　analyzed.　The　experimental　results　showed　that,　compared　with　the　catalytic　materials　with　pure　TiO2　as　the　carrier,　the　particle　size　of　the　catalyst　materials　with　TiO2-SiO2　composites　as　the　carrier　is　uniform　and　piling　up　in　a　fluffy　state.　The　specific　surface　area　and　pore　volume　of　catalytic　mate-rials　have　increased,　and　the　number　of　weak　acid　sites　has　also　been　greatly　improved.　When　the　molar　ratio　of　silicon　to　titanium　is　4:　1,　the　denitration　efficiency　can　reach　more　than　90%.　©　2018,　Materials　Review　Magazine.　All　right　reserved.