In this paper,the firefighting tactics of substation fire are studied,the research background and significance are introduced,the severity of substation fire accident and the threat to power system security are pointed out,and the research status at home and abroad is summarized.In terms of firefighting tactics,this paper elaborates with combat cases the tactics of strengthening the first response force,blocking the fire,continuously detecting voltage,enhancing personal electric shock protection,concentrating on comprehensive coverage and continuously monitoring and cooling the fire.The main results and innovations of the study are summarized,which provide theoretical and practical guidance for improving the efficiency of substation fire extinguishing and ensuring the safety of power system.