Materials and processing technologies for reusable liquid rocket engine are systematically reviewed in this paper.Some key components such as thrust chamber， turbopump，and nozzle， etc. used in hydrogen-oxygen rocket engine，liquid oxygen-kerosene rocket engine and liquid oxygen-methane engine are respectively expounded about the material selection and forming process. According to the performance requirement and structure character of different liquid rocket engine， the latest development trend of key material and processing is speculated.Compared with domestic research situation of material and processing on reusable liquid rocket engine， some development thought about subsequent material and processing technology is proposed.