Green remanufacturing engineering is a new subject and promising ind. and simultaneously it is an inheritance and a development to maintenance engineering. The main aspects such as connotation, the course of development and key technology in green remanufacturing engineering are introduced in detail in this paper. The nano surface engineering is a key to the technology of green remanufacturing engineering. Some advanced technologies such as high velocity arc spraying, nano electric brush plating and nano antifriction self-repairing additive are studied to improve excellently the properties of antifriction, wear resistance and anti-corrosion of the component. The remanufacturing engineering is an important part of advanced manufacture engineering.