The content of cadmium and inorganic arsenic in brown rice and rice was detected. The results showed that cadmium was distributed evenly in the japonica rice, the content in brown rice and rice was nearly the same; while the inorganic arsenic in japonica rice was mainly distributed in the epidermis. After being processed from brown rice to rice arsenic content reduced 2 times. It provided a basis for removal of heavy metal residues in food and rational application of grain resources.