Abstract: Investigations were carried out on sample tree during 2017 and 2021 in 716 permanent sample plots in Lishui, Zhejiang province. Annual forest carbon stock and forest carbon sink from 2017 to 2021 was calculated by single plant biomass model and the unit area biomass model. The economic value of forest carbon sink in Lishui was measured respectively using the carbon tax rate method, the afforestation cost method, and the carbon market CEA price method. The result demonstrated that the average annual forest carbon stock in Lishui was 66 549 700 t and the average annual forest carbon sink 2 903 200 t. Forest carbon stock in Lishui was composed by 82.9% of arbor, 7.98% of bamboo, 2.67% of shrub and 6.45% of others. Carbon density was ordered by arbor>bamboo>shrub. Mean carbon density of forest and arbor had increased. Estimation accuracy of forest carbon stock in Lishui was more than 93%. According to the carbon tax rate method, afforestation cost method and carbon market CEA price method, the mean forest carbon sink value in Lishui from 2017 to 2021 was 3.484 billion, 793 million and 168 million yuan RMB respectively.