Abstract:Common buckwheat and naked oat are the predominant and featured grains of Inner Mongolia，however their nutrients，especially profile of minerals lack systematic determination and evaluation.A total of 60 common buckwheat and 30 naked oat samples were collected from six grain producing banners or counties in Inner Mongolia for two years，and 27 minerals were determined and analyzed.The results showed that Inner Mongolian common buckwheat and naked oat had abundant minerals，most essential macro and micro elements were significantly higher than corresponding data provided in china food composition（table）2004.Mg and P of the two crops were significantly higher than other grains，and from common buckwheat were significantly higher than naked oat.Common buckwheat is one of the best natural Mg resources.Common buckwheat and naked oat both had obvious species and original clustering feature by principal component analysis （PCA）on mineral profile.Li，Cr and Pb of common buckwheat from the most eastern Hure Banner were significantly higher than the most western Guyang County，while Se，Ti，Sn，Cd，Cs and Cu were lower than the most western Guyang County.The farther east，the lower the Se level.Se of common buckwheat from Hure Banner was significantly lower than that from Guyang County.Heavy metals were much lower than the maximum residue limit for cereals.