A kind of maintenance strategy method is put forward for improving security and reliability of missile launch vehicle. Health management model of launch vehicle is designed and established by analyzing the target of health management system for missile launch vehicle, making general structure and technology framework and optimizing monitoring parameters and means. The system can diagnose system health state by adopting sorts of data processing technologies, predict exact time and accurate position of fault, and trigger accurate management activities. The system is used to improve management level, efficiency and military combat effectiveness.