In order to identify the age-sequence of Robiniapsedudoacia plantations on ecosystem carbon storage, a survey was conducted in 8-, 15- and 22-year-old Robiniapsedudoacia plantations and shrubwood in Luoning County, Henan Province. The carbon content in the arborous layer (different organs), shrub-grass layer, litter layer and soil layer (0-50 cm) was determined. The ecosystem carbon storage along with characteristics was analyzed based on the biomass and the data analysisi of the soils. The result showed that the carbon content in Robiniapsedudoacia organs ranged from 42.60% to 50.92%, with an ascending order of trunk, bark, branch, rootstock, leaf, thick root, rootlet, big root, medium root, and fine root. There was no significant difference in carbon content in the shrub layer, herb layer and litter layer among the four stands. The carbon storage in these four ecosystems was 78.96, 99.78, 110.85 and 132.75 t.hm^-2, respectively. Compared with the shrub wood, the annual mean increments of carbon pool in the 8-, 15- and 22-year-old Robiniapsedudoacia plantations were 2.60, 2.13 and 2.44 t·hm^-2·a^-1, respectively.The arbor and soil layers were the main carbon pools, which contributed 85.14%-96.63% of the total. The carbon content in the arbor layer increased with an increase of the stand age, while it decreased in the soil layer. In other layers, however, no significant changes were observed in this study.