Abstract: Grain has been the main food crop in China for a long time. There are various processing methods of grain. Germination is one of the methods, which has the characteristics of green, environmental protection and health. It is an important way to improve the nutrition of grain. In this paper, the changes of starch, protein, fat,mineral elements, vitamins and other main nutritional components of grains during germination were reviewed,and the existing problems of germinated grains were analyzed. The purpose was to provide theoretical reference for the further processing of germinated grains and the development of cereal products, and to promote the efficient development and utilization of cereal resources in China.