Abstract: A large amount of flue gas will be produced in the production process of the converter, and the flue gas has a high temperature and a large number of dust particles. Therefore, the cooling and dust removal of the converter flue gas and the recovery of the waste heat in the high temperature flue gas of the converter are the key to environmental protection, low carbon and cost reduction and efficiency of the converter process. The treatment methods of converter flue gas were summarized. It also points out the defects of the traditional waste heat recovery and dust removal methods, introduces and analyzes the new waste heat recovery method, and proposes three technical routes of converter flue gas and product treatment application. Currently, the capability of collecting waste heat from medium and low-temperature converter flue gas is limited. Traditional OG method and LT method have problems with gas recovery quality, heat loss and poor dust removal effect and have been unable to meet the technical requirements of low-temperature converter flue gas waste heat recovery. Vaporization cooling pipeline coal injection dry waste heat recovery method and chemical molten salt energy storage method for low-temperature converter flue gas waste heat recovery provide a new technical way. According to the existing flue gas treatment process, the technical route with the low-temperature waste heat recovery of flue gas, the diversified utilization of converter gas and steam and the intelligent smelting as the core in the future was put forward, so as to make the efficient use of energy and reduce the energy consumption.