Abstract: Corn is one of the most important crops,and with the corn production growing,the corn reserves has been increasing in recent years. It is particularly important for protecting corn quality to study fully mechanism in corn physiological metabolism and quality changes during storage as well as change rules of related indicators.Quality of corn can be affected by storage conditions,including temperature,humidity,and climate changes,and the degree of corn deterioration can be detected by relative indicators during storage. Corn original moisture content has an great effect on corn kernels respiratory intensity and nutrients,and the greater original moisture content,the greater degree of mildew and the stronger the respiration,then more fat and starch content reduced more quickly.Corn lipids produce large amounts of free fatty acids due to respiration and hydrolytic enzymes,lipids is a component of the cell membrane,the membrane will be destroyed due to oxidation,leading to cell physiological disorder.This paper mainly focused on the research progress on corn physiological metabolism,corn nutrition changes,corn physicochemical properties changes as well as biological pests changes during storage.