With the continuous development of global industry, the field of mechanical design, manufacturing and its automation is facing in_x005fcreasingly severe energy and environmental pressure. In order to solve the problem of energy consumption and environmental pollution, this paper with energy saving design ideas as the core, in the material selection as the research object, by optimizing the material selection, using advanced numerical control technology and green processing technology, put forward a series of solutions, aims to provide reference for mechanical design and manufacturing and automation practitioners, promote the industry towards more sustainable and energy saving direction.