军用特别是歼击机发动机的设计、制造、维修比其他所有航空发动机都更难掌握，被极少数国家垄断，核心技术概不转让，表现为高风险、高投入、高壁垒、高成本。我国军用航空发动机的设计与制造还没有走出自主研发道路，长期靠测仿与进口满足需求。国内某企业经过二十多年不懈努力，已实现我国所有歼击机发动机（包括在研机使用的发动机）的自主维修，技术、能力、质量、效率、成本等达到或超过引进国水平，从无到有、由弱到强；特别是数十项具有自主知识产权的再制造技术研发与工程化应用，为军用航空发动机自主维修水平的跨越式提升发挥了不可替代的作用。

Design,manufacture and maintenance of military fighter engine are particularly a lot more difficult to learn than those of other military aero-engines. Owing to military aero-engine is monopolized by very few countries and its core technology is never transferred, it features high risk,high investment,high barrier and high cost. Currently,design and manufacture of military aero-engine in China have not reached the level of independent research and development,instead,the method of long-term dependence on copying or importing others' military engine is adopted to meet the needs. However,after over twenty years of unremitting efforts of some domestic enterprise,Chinese all fighter engines including engines powered in designing aircraft have completely achieved the level of independent maintenance,whose maintenance technology, ability,quality, efficiency and cost have reached or surpassed those of importing nations,with a change developing from nothing and an improvement from weak to strong. In particular, more than ten projects concerning research and development of remanufacturing technology and the engineering application with the feature of independent intellectual property rights have promoted leapfrog improvement of Chinese military aero-engine independent maintenance level,whose function cannot be substituted.