The resource utilization of industrial solid waste is an effective means to achieve carbon emission reduction and energy utilization. This study used circulating fluidized bed fly ash ( CFBFA ) and desulfurization gypsum ( FGD ) as mineral admixtures to prepare mortar specimens. The carbonation test, mortar strength test, XRD, and SEM-EDS microscopic test methods were used to explore the carbon sequestration capacity, mechanical properties, and reaction mechanism of mortar specimens under carbonation conditions. The results show that the incorporation of solid waste increases the slurry's porosity the calcium source's content, and significantly increases the CO2 absorption of solid waste mortar. The mechanical properties of the mortar are significantly improved after carbonation curing, and the expansion problem caused by high sulfur is eliminated. The utilization rate of industrial solid waste in Inner Mongolia can be increased to 36.5 % by using this process.