目的　分析放射性肺炎的临床特点 ,为放射性肺炎的防治提供经验和依据。方法　分析 2 3例放射性肺炎的临床表现、X线及CT、血象变化等特点。结果　急性期表现为发热、咳嗽、胸闷、气急 ,慢性期表现为咳嗽和肺功能减退。结论　放射性肺炎重在预防 ,急性期给予足量皮质激素和抗生素 ,慢性期病变为不可逆性病变 Objective To analyze the clinical features of radiation pneumonitis and provide experience and basis for the prevention and treatment of radiation pneumonia. Methods The clinical manifestations, X-ray, CT and hemogram changes of 23 cases of radiation pneumonitis were analyzed. Results The acute phase presented with fever, cough, chest tightness, and shortness of breath. In the chronic phase, it showed cough and decreased lung function. Conclusion Radioactive pneumonia focuses on prevention. In the acute phase, adequate doses of corticosteroids and antibiotics are given. The chronic phase lesions are irreversible lesions.