Abstract: In order to achieve the ultra-low emission of nitrogen oxides and NO_x in coal-fired boilers in our country, selective catalytic reduction（SCR） denitrification technology has been widely promoted and applied in China. The key to SCR denitrification technology lies in the performance of SCR denitrification catalyst. The SCR catalyst are can be deactivated due to physical structure damage and chemical poisoning during use. The large amount of waste SCR catalyst produced faces the problem of environmental pollution risks and resource waste. Based on the fact that the main components of the waste denitration catalyst, anatase TiO₂, W, and V are consistent with the new catalyst, it is an inevitable development trend to recycle and reuse the new catalyst. The recycling and utilization of waste denitration catalysts are mainly divided into three categories: direct regeneration and recycling, valuable metal recycling and carrier recycling. For the spent denitration catalyst with intact structure, it can be directly regenerated and reused by air purging, water washing, chemical cleaning, active implantation, high temperature roasting and other processes. The structural damage rate of waste denitration catalysts in our country exceeds 50%. Most of them cannot be directly regenerated and reused. Valuable metals such as V, W, and Ti can be recovered from damaged waste denitration catalysts by adopting acid-base leading process and melting technology. Therefore, it is necessary to speed up the research on feasible carrier reuse technology, create a carrier reconstruction technology judgment standard based on the degradation index of the pore structure of the denitration catalyst carrier, reveal the deep purification and reconstruction mechanism of the carrier, and form an economical and re asonable waste environmental protection catalyst. With the goal of green recycling of resources,appropriate technical routes and production processes are designed according to the quality of waste SCR denitration catalysts. Through the full life cycle operation management of the regeneration of spent SCR denitrification catalysts and the characteristic performance and operation of catalyst products in long-term operation,the process can be improved. The efficiency of recycling and utilization and the reduction of production energy consumption can solve the problem of the reliability of the regenerated carrier catalyst.