Taking Schima superba Cyclobalanopsis glauca mixed plantation (SP) and Elaeocarpus sylvestris pure plantation (EP) both plantations were transformed from degraded shrub forest (DF) in north subtropical areas of China as test objects,we studied the effects of species composition on ecosystem carbon storage of broad leaved plantations.(1)Both the vegetation and soil carbon storage significantly increased after the DF was transformed into broad leaved plantations.The increases of vegetation carbon storage appeared mainly in arborous layers.Compared with DF,the soil carbon storage of SP and EP was significantly increased in each interval of 0-50 cm depth,respectively.(2)The vegetation carbon storage was higher in EP than that in SP,with an increase of 99.4%.Compared with SP,the carbon storage in arborous layer of EP was 27.75 t·hm^-2 higher,which was as twice as that of SP.The soil carbon storage in EP was 10.17 t·hm^-2 higher than that in SP,with a significant difference.In addition,the soil carbon storage in each interval of 0-50 cm depth of EP was higher than that in SP,with significant differences in 0-10 cm and 20-30 cm layer.To sum up,the total carbon storage of degraded shrub forest was significantly increased after transformed into evergreen broad leaved plantation and EP had greater ability of carbon accumulation than SP.Results from the present study suggested that the choice of tree species would be important during the restoration of degraded ecosystems with the aim of enhancing ecosystem carbon storage.