Radiation-induced lung injury （RILI） is caused by the "heat toxin" of radiation. Based on the clinical manifestation and the pathological characteristics of RILI in different phases in modern medicine， RILI is divided into three phases， that is intense heat toxin phase， yin deficiency and heat accumulation phase， and static blood obstruction phase， for which "three phases and three methods" has been proposed to prevent and treat RILI. For the early stage of RILI， that is intense heat toxin phase， it is recommended to use the method of clearing the lung and resolving toxins， usually with Yin Qiao Powder （银翘散） in modifications. Regarding the middle stage which is yin deficiency and heat accumulation phase， the method of enriching yin and venting heat is recommended， often using self-made Yangyin Qingfei Formula （养阴清肺方）. In terms of the late stage， that is the static blood obstruction phase， It is recommended to invigorate blood and dissolve stasis， usually with self-made Qingfei Huoxue Formula （清肺活血方）.