Heavy metal pollution is an important aspect of cereal quality and safety. Countries and organizations all over the world attach great importance to the control of heavy metals in cereals.Through the comparison and analysis of cereal heavy metals limit standards of CAC,European Union, the United States and China, this study has found out the existing gaps in China's current national food safety standards concerning the heavy metals pollution index of cereals, which could provide references for the revision of China's heavy metal limit standards of cereals.