According to the requirements of airworthiness standard CCAR-25,the fire protection for airplane engine nacelles structure are designed, and the typical structures of nacelles for ifre protection capability are experimented. The experimentation results indicate that the materials and structure design can isolate the ifre and prevent the air and oil from going to the ifre areas. The ifre protection and airprooifng capability of rubbers are perfect. The ifre protection and agglutination capability of dopes are all right. They can satisfy the requirements of airplane design.%按照运输类飞机适航标准第25部（CCAR-25）适航条款的要求，对某型飞机发动机短舱结构进行了防火设计，并对发动机短舱典型结构的防火性进行了试验验证。试验结果表明发动机短舱的材料选用、零部件的结构设计能隔离火焰，并阻止燃油或空气输给着火区，橡胶型材的防火性、密封性及防火涂料的防火性、粘合性良好，满足飞机设计要求。
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