This　paper　presents　a　method　for　efficiently　removing　nitrogen　oxides　produced　during　cement　production　by　utilizing　coal　fly　ash,　a　common　substitute　in　cement　raw　materials.　The　surface　acidity　and　reactive　species　content　of　coal　fly　ash　were　improved　by　acid-base　modification　to　participate　in　the　cement　production　process　for　efficient　NOX　removal.　In　this　work,　the　activity　of　modified　coal　fly　ash　in　the　denitration　reaction　and　the　adsorption　and　reaction　mechanism　of　NH3+NO+O-2　on　its　surface　were　explored.　The　research　results　show　that　the　NO　conversion　of　modified　coal　fly　ash　reaches　more　than　94%　in　the　range　of　800-1000　degree　celsius.　The　modification　process　of　base　activation　and　acid　precipitation　promoted　the　formation　of　pores　and　the　exposure　of　active　components　on　the　surface　of　the　coal　fly　ash,　increasing　the　number　of　acidic　sites　and　oxygen　vacancies.　The　DRIFTS　results　indicated　that　NH3　and　NO　were　coadsorbed　on　the　modified　coal　fly　ash,　formed　active　intermediates,　and　eventually　decomposed　into　N-2,　achieving　the　high　efficiency　of　NOX　removal.　This　study　provides　an　efficient　method　to　remove　NOX　from　cement　production　using　modified　coal　fly　ash,　which　gives　a　new　idea　for　low-carbon　cement　production.