At the early stage of the "14th Five-Year Plan", the annual growth of bulk solid waste in China still more than 3 billion tons. The utilization rate of bulk solid waste remained low, such as tailings, fly ash, coal gangue, smelting waste and red mud. This situation occupies a lot of land resources and easily causes composite pollution of water, soil, gas and others. The effective utilization and disposal of bulk solid waste has been widely concerned at home and abroad. However, the traditional end disposal process tends to emit a lot of greenhouse gases such as carbon dioxide, methane and nitrous oxide and others. In order to fully implement the requirements and decision-making arrangements of the Party Central Committee and The State Council, which is about promoting the comprehensive utilization of bulk solid waste, improving resource utilization efficiency, reducing carbon emissions and achieving peak carbon neutrality during the "14th Five-Year Plan" period. The sub-forum is centered around the purposes of constructing 50 demonstration bases for comprehensive utilization of bulk solid waste The goal is to achieve a comprehensive utilization rate of more than 75% in these demonstration bases, enhancing the regional carbon reduction support capacity. The sub-forum named "Collaborative Efficiency Technology for Pollution Reduction and carbon Reduction of Bulk Solid Waste", plans to invite well-known experts in the field of ecological environment and solid waste disposal. The aim is to exchange and share the latest management policies, cutting-edge technological innovation results, and typical engineering application practices of bulk solid waste, facing to scientific research institutions, management departments, treatment and disposal units, and representatives of enterprises, etc. The sub-forum aims to promote the industry development under the background of carbon peak and carbon neutrality, taking maximum advantage of synergistic effect to the realize the goals of pollution reduction and carbon reduction by comprehensive utilization of bulk solid waste on.