Facing increasingly prominent pressures on energy,resources,and environment in China,efficient utilization of solid waste resources in the steel industry is a key link to achieving green,sustainable,and circular development. As a metallurgical by-product with strategic recycling value, the resource utilization of steel slag has attracted much attention. The sources,properties,and main components of steel slag are systematically summarized,and its current status of resource utilization are reviewed; systematic explanation and analysis of steel slag in the field of carbonation and CO₂ storage are focused on,subsequent utilization pathways and potential value of products are explored,key technological challenges in large-scale applications are analyzed,and counter measures are proposed to provide references for resource utilization of solid waste in the steel industry and achieve the “dual carbon” goals.