Aero-engine is a device that provides power for aviation equipment. Maintenance is an important stage in the whole system and whole cycle of aero-engine. The development history of aero engine maintenance is introduced briefly. The aero-engine repair technology development is presented based on fault inspection, deposit washing, assembling and remanufacturing technology development is presented based on development history, key technologies and development process. Finally, the development prospect of aero-engine maintenance and remanufacturing is forecasted.