Abstract: Soil is the core of terrestrial ecosystem. Investigations into soil carbon （C） pool would clarify the role of soil in terrestrial ecosystem C cycle and global change. In the present study， 145 soil profile data collected from 2009 to 2012 were analyzed by soil type and GIS method to estimate the soil C pool in Zhejiang Province. The total amount of soil organic carbon （SOC） in Zhejiang Province was about 081～083 Pg， and the average soil carbon density was 808～837 kg·m-2. The SOC density varied within soil types. The lowest SOC density was shown as a southeast strip from Jinqu Basin to Taizhou\|Wenzhou costal area， and the SOC density increased gradually outward to the north， west and south. Finally， the advantages and disadvantages of soiltype and GIS\|estimation method in SOC evaluation were compared.

Key words: Zhejiang Province, soil organic carbon density, organic carbon storage, GIS