Abstract:Extrusion technology has the advantages of changing material properties，short production time and high continuity. It has extremely high application value in the process of food research and processing.Especially in the field of multigrain processing，this technology can not only retain nutrients well，but also improve the sensory experience of product flavor and taste，and which has a very broad prospect. This article was purposed to systematically introduce the changes of nutrients after extrusion processing of multigrain and the application research of extrusion technology in multigrain processing，and simultaneously analyze the application prospects of extrusion technology in multigrain processing. It took aim at enriching the varieties of multigrain research and development，and providing reference for its theoretical basic research.