SO2　and　NOx　are　the　main　air　pollutants　in　cement　kiln　exhaust　gas,　and　reducing　their　emissions　has　become　the　main　way　to　control　air　pollution.This　work　attempts　to　prepare　composite　absorbent　by　using　agricultural　waste　slag　rice　husk　ash　and　industrial　waste　slag　carbide　slag,　in　the　formation　process　of　cement　clinker　to　achieve　desulfurization　and　denitrification.　The　impacts　of　rice　husk　ash　and　carbide　slag　ratio　(2:　5-18:　5),　reaction　temperature　(500-900)　and　oxygen　concentration　(0%-3%)　on　the　desulfurization　and　denitrification　efficiency　of　composite　absorbent　were　studied.　The　results　showed　that　the　ratio　of　rice　husk　ash　and　carbide　slag　was　6:　5,　which　was　incorporated　into　the　cement　raw　meal　under　900　and　1%　oxygen　concentration,　the　denitrification　rate　reached　97%　and　the　desulfurization　rate　was　99%.　The　use　of　two　kinds　of　waste　slag,　rice　husk　ash　and　carbide　slag,　to　prepare　a　composite　absorbent　could　effectively　remove　SO2　and　NOx　in　a　cement　decomposition　furnace.　©　2018,　Materials　Review　Magazine.　All　right　reserved.