Abstract: As global carbon emissions become increasingly severe, CO₂ mineralization technology has become one of the effective means to address climate change. Firstly, the background of carbon emissions and climate change was presented, highlighting the importance of CO₂ mineralization technology in addressing carbon emissions in industrial systems. Subsequently, the basic principles of CO₂ mineralization technology were introduced, including the three main steps to control the CO₂ absorption rate and the four main resistances of molecular diffusion. Next, regarding the mineralization technology route, the current development status, advantages and disadvantages, and technical bottlenecks of the technology route are introduced from the perspectives of direct method and indirect method. The advantage of direct method is that the process route is simple and does not require additives. The disadvantage is that it is difficult to separate carbonates and impurities in mineralized products, resulting in difficulties in product utilization. The technical bottleneck lies in the development of efficient mineralization reactors and the integration of product scale application routes. The advantage of indirect method is that it can produce pure calcium carbonate products with high product value. The disadvantage is that the process is complex and consumes leaching agents, requiring additional wastewater and exhaust gas treatment processes. The technical bottleneck is to achieve efficient recycling of leaching agents, reduce leaching agent consumption, and achieve harmless wastewater and exhaust gas treatment. Then, the engineering demonstration projects corresponding to the technical route were introduced, such as CO₂ mineralization curing concrete brick making, fly ash mineralization, carbide slag mineralization, etc. The basic information of the process routes of these projects was introduced, and the project production capacity, investment, and current progress were summarized. The advantages and disadvantages of each technical scheme, the prospects of large-scale application, and the existing problems were discussed. Finally, adaptability analysis of the technology route selection was proposed, emphasizing four important factors: technological maturity, application scenario matching, mineralization product economy, and energy consumption and environmental protection of the process. The prospects and challenges for the promotion and application of this technology were discussed. A detailed overview of the engineering application progress of alkaline solid waste CO₂ mineralization technology was provided, providing reference for the large-scale application and promotion of alkaline solid waste CO₂ mineralization technology.