Abstract: Jiyuan section on the southern slope of Taihang Mountains is an area with relatively special topography, landforms and vegetation types in the Yellow River Basin. Estimating and comparing the soil physical properties and organic carbon density of different land use types in this area is of great guiding significance for rational land use and soil carbon pool management. By taking the(0, 40 cm surface soil of Platycladus orientalis forest, Robinia pseudoacacia forest, Quercus variabilis forest, economic forest, cultivated land and wasteland as the research objects, and through field investigation and sampling and indoor laboratory analysis, the authors compared and analyzed the vertical distribution characteristics of soil bulk density, organic carbon content (SOC) and soil organic carbon density (SOCD) of different land use types, and further analyzed the correlation between soil physical properties and organic carbon. The average range of organic carbon content of (0, 40 cm surface soil in six land use types is 9.46×10^-3~15.13×10^-3, and the average content is the lowest in cultivated land and the highest in wasteland. The average range of soil organic carbon density is between 1.33~2.27 kg/m^-2, and the average value is the lowest in economic forest and the highest in wasteland. Both the soil organic carbon content and soil organic carbon density of different land use types and different depths show variation characteristics. The soil organic carbon content and soil organic carbon density decrease with the increase of depth, except cultivated land and economic forest. The soil organic carbon density in the (0, 10 cm soil layer is significantly higher than that in other layers of the profile. The soil organic carbon content is positively correlated with soil organic carbon density and negatively correlated with soil water content. Different land use types could affect the input of soil carbon sources, and thus affect soil physical properties, soil organic carbon content and soil organic carbon density. The research results could provide references for soil carbon sink assessment in this area.