With the rapid development of the aviation industry,as the core component of aircraft,the pollution problem of the lubrication system of aircraft engines is one of the key factors affecting the engine life and performance.In response to this,this study is based on the analyzes of the main hazards of pollution in the lubrication system of aircraft engines,explores the main causes of metal chip pollution and moisture pollution,and proposes pollution prevention and control measures for the lubrication system of aircraft engines during maintenance,aiming to effectively control the pollution of the lubrication system,improve the operational reliability and service life of the engine.