With the promotion of ultra-low emission of coal power in electricity industry, the focus of air pollution prevention in China has changed from electricity industry to non-electricity industry. Iron and steel industry has become the focus of emission reduction at present, and the sintering process, as a major energy consumer and polluter, has great potential for energy saving and emission reduction. In this paper, the emission characteristics of sintering flue gas and the utilization status of sintering afterheat are mainly introduced, the high-efficiency recycling technologies of sintering afterheat, such as thick bed sintering technology, sintering flue gas circulation technology, mechanical sealing and water sealing technology, vertical tank recycling technology of sintering afterheat, etc., are summarized. The advantages and key problems of each technology are analyzed to provide technical reference for energy saving and emission reduction transformation of sintering process.