Abstract: Wheat,rice and maize,as three main staple foods in China,their germs in the grains are rich in various nutrients and some phytochemicals,such as flavonoids,lectins,phytosterols,oryzanol. Germ is a good raw material for functional foods. This paper reviews the main nutritional components and bioactive components of the three major staple foods,some germs foods were introduced too,including of the plant protein drinks,functional oils,flour and its products,etc.