Abstract: Abstract: 【Objective】Forest ecosystems at the Wuyanling Nature Reserve in Zhejiang Province close to the Pacific Ocean have a unique marine climate and play an important role in the subtropical region of China. Exploring the soil organic carbon content and its distribution characteristics among different forest types can provide information for improving the management of soil carbon pools and promoting sustainable management and development of forest ecosystems.【Method】The content of the soil organic carbon(SOC)and soil water-soluble organic carbon(WSOC)of seven forest types(pine forest, Chinese fir forest, Cryptomeria fortunei forest, broad-leaved forest, mixed forest bamboo forest, and tea plantation)were determined by Shimadzu TOC-L_CPH total organic carbon analyzer, and their correlations with soil factors were analyzed. 【Result】 The SOC content and WSOC contents of all seven forest types decreased with increasing soil depth, showing obvious vertical distribution patterns. The SOC contents in all soil layers were the highest in the Chinese fir forest, and the WSOC contents in the soil layers ≥10-25 cm and ≥25-40 cm were also the highest in the Chinese fir forest. The percentage of WSOC to SOC varied from 0.59% to 1.51%, among which the highest was found in the layer ≥25-40 cm in the Chinese fir forest and the lowest was found in the layer ≥25-40 cm of the pine forest. There was an extremely significant negative linear correlation between SOC and bulk density(P < 0.01), and a significant negative linear correlation of SOC with pH(P < 0.05). The content of WSOC showed an extremely significant negative linear correlation with both soil bulk density and pH(P < 0.01). 【Conclusion】Soil bulk density and pH are both important factors affecting SOC and WSOC contents in the Wuyanling Nature Reserve.