Abstract: KR hot metal desulphurization (also known as mechanical stirring method) has the advantages of high desulfurization efficiency,stable desulfurization effect and low desulfurization cost due to its better reaction conditions. It is widely used in major domestic and foreign steel companies and has gradually become the preferred process for hot metal desulfurization pretreatment.  The research results in recent years on improving the dynamic conditions of the KR mechanically stirred hot metal desulfurization were summarized. By understanding the development of the desulfurization reaction at home and abroad，it provides references for the improvement or optimization of KR dynamic conditions.

Key words: hot metal desulfurization, KR mechanical stirring method, reaction dynamic