Abstract: Carbon storage data at different stand ages were analyzed at the provincial scale, in order to master the dynamic carbon allocation pattern of Cunninghamia lanceolata plantations in Jiangxi Province. This study carried out field investigation on the ecosystem of Cunninghamia lanceolata plantations in Jiangxi Province, and comprehensive analysis of the present biomass data of Cunninghamia lanceolata. The results showed that, carbon storage of Cunninghamia lanceolata plantations in Jiangxi Province ranged from 27.82 to 82.61 t/hm², and the tree layer carbon storage accounted for more than 94.2%. The carbon storage of Cunninghamia lanceolata plantations and their tree layers increased with the age increasing at first, and then decreased. Carbon storage of the shrub layer, herb layer and litter had no significant difference among all age forests. The permutation order of carbon storage of each component in young, premature and mature plantations was: tree layer > litter layer > shrub layer > herb layer, however, the permutation order in middle-aged and overaged plantations was: tree layer > litter layer > herb layer > shrub layer. The permutation order of carbon storage of each organ in young plantation was: trunk > leaf > root > branch, but the permutation order in other four plantations was: trunk > root > branch> leaf.