Abstract：This paper introduces the clinical experience of treating severe pneumonia by heat-clearing， yin- nourishing and phlegm- resolving method. Severe pneumonia can be treated by symptomatic treatments like anti-infection and resolving phlegm，but it is difficult to stabilize the blood oxygen saturation of many patients，and the phlegm-resolving effect is not ideal. Combined with regional climate and dietary structure， it is found that dampness and heat can not be ignored in the course of severe pneumonia. Therefore，it is believed that the core pathogenesis of severe pneumonia in Chinese medicine is phlegmheat obstructing the lung and the deficiency of both qi and yin. It can be treated by heat- clearing， yinnourishing and phlegm- resolving method. Chinese medicine helps stabilize the oxygen saturation of patients.