The structural health of an aircraft engine directly affects the performance, reliability, and flight safety of the aircraft. Due to the extremely harsh working conditions of the engine, such as high temperature, high pressure, high speed, and high load, these factors can affect normal operation of the engine and threaten flight safety. This article is based on integrated monitoring technology to study the online monitoring technology of aircraft engine lubricating oil debris. Two types of integrated monitors, stacked-type integrated monitor and oneness integrated monitor, for monitoring the lubrication system and mechanical motion status of aircraft engines are analysed. Combined with the aircraft engine structural health management/comprehensive diagnosis monitoring and warning system, the composition structure, functional interface and application of the system are introduced. At present, aircraft engines suffer from multiple faults such as structural and vibration failures, as well as dangerous faults, such as fractures and fires. After extensive testing with testers, endurance testing of aircraft engines, and flight testing results, it has been shown that the online monitoring technology of aircraft engine lubricating oil debris based on integrated monitoring technology can achieve real-time monitoring of oil temperature, oil pressure and oil debris of aircraft engine lubricating oil system, as well as the vibration, speed and other states of the aircraft engine. It can achieve the structural health monitoring capability of relevant structural components and systems, further improving the comprehensive diagnosis, monitoring and warning functions of aircraft engines, providing guarantees for the safe operation of aircraft engines.