 This study examined the distribution of soil organic carbon, nitrogen, cation exchange capacity and specific surface area in different soil particle sizes. It was found that as the particle size decreases, the soil organic carbon, nitrogen, cation exchange capacity and specific surface area all increase. Additionally, it was discovered that there are strong correlations between these parameters and the equivalent diameter of the soil particles. This research provides important data on the distribution of soil properties in relation to particle size, which can be used to better understand soil properties. This article was authored by Xiaojian Bai, Hanzhu, Mingming Fu, and others.