In this study, Aohan county in Chifeng of Inner Mongolia was collected as the study area, the spatial distribution of soil organic carbon (SOC) content at 0-100 cm was studied based on soil survey data and considering the changes of land use type and terrain in order to estimate carbon storage and to rationally use land resources. The results showed that SOC content was within 0.23-20.71 g/kg, SOC content was mainly concentrated in 0-40 cm soil, SOC content decreased gradually with increasing soil depth and SOC contents exhibited in an order of woodland > farmland > grassland. SOC was mainly stored in the flat area of high altitude. SOC content of different land use types were significantly reduced when slope>10°due to soil erosion.