Abstract: According to the forest inventory data of Jiangsu in 2000 and 2005, the dynamic carbon storage, carbon density and the economic value of forest in Jiangsu were assessed by means of the regression equation between stand biomass and volume of different forest types. The results showed that total carbon storage of forest in Jiangsu was 25 165 600 t in 2005, with an annual increment of about 1 600 000 t from 2000 to 2005, which suggested that the forests in Jiangsu province were the important sink of CO2. The average carbon density was 21.2 t/hm2, far less than the national and global average level. The carbon storage in three different geographical areas (the south, the centre and the north of Jiangsu province) accounted for 18.54 %, 8.68 % and 72.78 % respectively. Xuzhou had the most carbon storage among all of the 13 prefectures in Jiangsu (20.93 %), followed by Suqian and Huai’an, while Nantong had the least carbon sink (0.92 %). The north of Jiangsu had the highest average carbon density, and the next is the centre and the south of Jiangsu. Among the forest types, most of the carbon storage sank in the broadleaved forest, in which, poplar was dominant species. Poplar plantation areas accounted for 90.27 % of all the new forest and carbon sank in poplars increased from 39.51 % to 66.12 %. The planting area and carbon storage have been declining of coniferous forest. From the age group, carbon storage is abundant in the young and middleaged forests, which accounts for 72.86 % of the total carbon sink in trees in 2005. In those five years, the total economic value of carbon sink was about 9.6 billion RMB in Jiangsu province.