In order to explore the correlation between the available contents of Zn (zinc), Fe (iron), Ca (calcium) and B (boron) in oat grains and their available contents in soil, 332 sites of 240 villages were selected in three districts and counties with large oat planting area in Shanxi Province (Pinglu District and Youyu County of Shuozhou City, and Zuoyun County of Datong City). The topsoil was collected and the oat grain samples were harvested. The available contents of the four elements in the soil and their contents in oat grains were determined, and the correlation between the two was analyzed. The results showed that: the available contents of the four elements in the soil of the three production areas ranked as Ca>Fe>Zn>B, where the content of Ca was high, and the contents of Fe, Zn, and B were medium or low. Comparing the available contents of the four elements in the soil of different sampling points under the same district and county, the variation of available Zn content was large, the variation of available Ca content was small, and the differences of the available Fe or B contents falled into the middle. The average accumulation of the four elements in oat grain ranked as Ca>Fe>B>Zn. Compared with the results of other studies, the average content of Fe and Zn was relatively low, while the average contents of Ca was relatively high. Compared the accumulation of the four elements in oat grains in the different sampling sites under the same district and county, the variation of B accumulation was large, the variation of Zn accumulation was small. and the variations of Ca or Fe accumulation were in the middle.Correlation analysis showed that there was significantly positive correlation between the contents of available Zn, Fe and B in soil, and there were regional differences in the correlation between the contents of these three elements and Ca content. The contents of Zn, Fe and B in oat grains were positively correlated with the accumulation of Ca. The correlation between the original accumulation of the four elements in oat grains and their available contents in soil was different in the three counties. Among them, in Youyu County, where the available content of soil, especially Ca content, was relatively high, there was significantly positive correlation between grain Zn and soil available Zn, Ca and B. The correlation between grain Zn and soil available Zn, Ca and B was significantly positive. In summary, the contents of available Fe, Zn and B in soil and the content of Fe, Zn and B in oat grains in the oat production area of this experiment could be improved. Appropriate reduction of soil available Ca content in calcareous soil area is helpful to promote Ca accumulation in oat grains.