Abstract: 　Necrotizing pneumonia is a rare but serious complication of community-acquired pneumonia. It is the result of the joint action of pathogenic microorganism and immune disorder. The incidence rate increased gradually in recent years. Necrotizing pneumonia is characterized by the destruction of the parenchyma structure of the lung and the formation of cavity in the liquefied necrosis, and the infection of various pathogens can lead to necrotic pneumonia in children. The main reponsible bacteria are Streptococcus pneumoniae and Staphylococcus aureus in foreign reports, and are Mycoplasma pneumoniae in our country. The necrotizing pneumonia in children is more severe and progresses more rapid, has longer course and more complications than common pneumonia. The diagnosis depends on the CT. In addition of antibiotic treatment, combination of glucocorticoid, gamma globulin and bronchoalveolar lavage was used, and most of the children have good prognosis.