Soil plays a key role in regulating carbon and nitrogen cycle，promoting carbon and nitrogen storage and maintaining ecological balance in forest ecosystem. The vertical variation and tempo-spatial distribution characteristics of forest soil organic carbon and total nitrogen content and density in South China were explored so as to provide data support for forest soil carbon and nitrogen storage prediction and management. Based on the historical data of forest soil organic carbon and total nitrogen content in South China from 2005 to 2023，a regression model of soil bulk density and organic matter was established to estimate soil organic carbon and total nitrogen density and storage. By using statistics and geostatistics methods，the change characteristics of forest soil organic carbon and total nitrogen content，density and storage in 0-60 cm soil layer in South China was investigated，and the influencing factors was analyzed. The results showed that:(1)The average density and storage of soil organic carbon in 0-60 cm soil layer in South China were 3.53 kg·m-2 and 2452.13 Tg C，respectively，and the average density and storage of total nitrogen were 0.27 kg·m-2 and 194.30 Tg N，respectively. The soil organic carbon and total nitrogen density and stock in different provinces were in the order of Guangxi > Guangdong > Hainan； (2)The Kriging interpolation showed that the spatial distribution characteristics of forest soil organic carbon and total nitrogen density were similar in all soil layers with heterogeneity，and the overall distribution characteristics indicated higher in the northern and central parts by west，and lower in the southern coastal areas. Higher soil organic carbon density and lower total nitrogen density were found in the northeast. (3)Elevation，soil bulk density and total phosphorus were the key factors for the change of soil organic carbon and total nitrogen density and storage in South China. In conclusion，the supplement of missing soil bulk density using the organic density model can help effectively predict soil carbon and nitrogen storage and manage the carbon and nitrogen pool. The organic carbon and total nitrogen densities in 0-60 cm soil depth in South China have obvious spatial distribution pattern with significant differences among provinces.