Abstract: Equal channel angular extrusion(ECAE) is an important technology to improve the plasticity and structure property of alloys and plays an important role in improving quality of follow-up processing.In this paper,the development and industrial applications of ECAE is described.Extrusion process,and the effects of path of extrusion,extrusion angle,extrusion speed,extrusion temperature and other process parameters on structure property are analyzed and the research and application are proposed.