目的　分析老年院内获得性肺部感染的特点　方法　回顾总结近五年来临床老年院内获得性肺部感染的临床首发症状、体征、辅助检查、并发症、致病细菌谱及其药物耐药率等情况　结论　老年院内获得性肺部感染临床表现不典型 ,并发症多 ,仍以革兰氏阴性细菌感染为主 ,耐药率高 Objective To analyze the characteristics of acquired pulmonary infection in elderly patients. Methods The clinical symptoms, signs, auxiliary examinations, complications, pathogenic bacteria spectrum and drug resistance rate of acquired pulmonary infections in the elderly in recent five years were reviewed. Conclusions The clinical manifestations of acquired pulmonary infection in elderly patients are not typical and there are many complications. Gram-negative bacterial infections are still the mainstay, and the rate of drug resistance is high