With the increasing attention to the energy environment in our country, the new technologies and measures for energy utilization and emission reduction in the iron and steel industry are explored continuously. The sintering process is the main energy consumption link of iron and steel smelting, and reducing the energy consumption in the sintering process is of great significance to the energy saving and emission reduction of the steel industry. The high efficient recovery and utilization of waste heat in the cold flue gas of the circular cooler can effectively reduce the energy consumption in the sintering process and improve the sintering area environment. In view of the process characteristics of sintering and cooling process, based on the original waste heat utilization technologies like hot air sintering, steam production from waste heat and waste heat power generation etc., such technologies as cyclic utilization of low temperature waste heat and on-cooler boiler etc. are explored further in order to realize gradient utilization of waste heat in sintering flue gas of circular cooler, and thus to realize its industrial application eventually.