In accordance with the stratified sampling method , the paper selected from a sample of 6 counties in Fujian Province, and in a sample county in accordance with local conditions and tree species of non-commercial forest mature forest plots were selected. Appling volume conversion factor method, the paper calculates carbon sequestration of the sample. The calculation results show: per unit area and annual carbon sequestration of the main tree species of non-commercial forest from high to low is Eucalyptus,Casuarina equisetifolia, fir, pine and broad-leaved tree.