According to the fault characteristics of aero-engine, the existing data conditions and the requirements of health management, the fault prediction and health management (PHM) at home and abroad are studied and analyzed. By covering condition monitoring and analysis, sub-health state diagnosis, performance decline trend tracking and analysis, fault prediction and life management, the predictive diagnosis and corresponding maintenance support of the engine are realized, so as to improve the safety of the flight mission and the reliability of the plan execution. The results show that the analysis can lay the foundation for continuous aero-engine health management research and provide technical support for the real meaning of condition-based maintenance.