SO2　is　the　main　pollution　gas　that　pollutes　the　atmosphere,　endangers　health　and　causes　economic　losses.　It　is　also　one　of　the　main　exhaust　gases　discharged　from　cement　kilns　and　other　large-scale　industrial　production　processes,　which　seriously　affects　our　lives.　In　the　current　desulphurization　method,　dry　desulphurization　has　no　waste　slag　wastewater　generation,　low　heat　loss,　is　conducive　to　energy　saving　and　emission　reduction,　and　is　the　most　environmentally　friendly　method　at　present.　In　many　dry　desulphurization　agents,　calcium-based　desulphurization　agent　has　an　important　position　because　of　its　rich　resources,　and　easy　to　use.　Calcium-containing　industrial　waste　slag　was　used　in　the　preparation　and　modification　of　calcium-based　desulfurizer　to　improve　dry　desulfurization　performance　due　to　its　high　calcium　content　or　rich　metal　oxides　and　SiO2.　In　this　paper,　the　present　research　on　the　preparation　of　calcium-containing　industrial　waste　slag　and　the　modification　of　calcium　base　desulfurizer　for　dry　desulphurization　were　reviewed,　and　the　modification　methods　to　improve　the　desulphurization　performance　of　calcium-containing　industrial　waste　slag　were　discussed　by　analyzing　the　modification　mechanism　and　desulfurization　reaction　process.　©　2022,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.