Abstract： This paper introduces the clinical experience of Professor ZHANG Peijiang in treating insomnia from the perspective of ministerial fire. Professor ZHANG Peijiang believes that the frenetic stirring of ministerial fire loses its position and becomes thief fire，and that the pathogenic fire harassing the heart spirit leads to insomnia. The common clinical classification of types includes frenetic stirring of ministerial fire， constraint and obstruction of ministerial fire， vigorous sovereign fire and ministerial fire， and deficiency and debilitation of ministerial fire， etc.， which should be treated according to syndrome differentiation. Those with frenetic stirring of ministerial fire should return fire to its source，and often be treated with modified Yinhuo Tang， Fengsui Pellets， and Buzhong Yiqi Tang. Those with constraint and obstruction of ministerial fire should be treated as nourishing the kidney water，draining the ministerial fire， raising the liver qi，so that the heart fire is handed down to restore interaction with the kidney. It can be treated by modified Erxian Tang and Ganmai Dazao Tang. Those with vigorous sovereign fire and ministerial fire should be treated to clear heart fire， restrain ministerial fire and enrich kidney yin， with modified Danggui Liuhuang Tang； if the fire- heat stays for a long time and fluid becomes phlegm， Huanglian Wendan Tang can be modified to treat. Those with deficiency and debilitation of ministerial fire should be treated by warming the kidney and assisting yang，nourishing the heart and calming the mind，and can be treated with Jingui Shenqi Pills.