Abstract: To study the variation of soil carbon storage during inverse succession in subtropical forests,primary forest(subtropical evergreen broad-leaved forest),Populus rotundifolia forest(secondary forest) and tea plantation(planted forest) as the typical forests were selected in Ailao Mountain and soil organic carbon content,soil bulk density and carbon storage by layers of soil profile from 0 to 100cm depth were measured.The results showed that:soil bulk density increased but the soil organic carbon contentdecreased from primary forest to tea plantation,while soil organic carbon storage ranked decreasingly as primary forest (445.7Mg·hm-2),tea plantation(427.7Mg·hm-2),and secondary forest (314.5Mg·hm-2,which shows that during the inverse succession of subtropical forests,the carbon storage in planted forests is greater than the secondary forests due to fertilizer and forests management.The carbon storage of the first 40cm soil profile to that of 100cm soil profile decreased as subtropical evergreen broad-leaved forest(63.0%),secondary forest(57.2%) and tea plantation(52.4%).Soil bulk density,soil organic carbon content and soil organic carbon storage dynamic of soil profile layers vary during different forest types,but are not significantly different at depth below 60cm.It suggests that the inverse succession does not influence the soil carbon storage in deep soil layers.It is recommended to focus on the feedback of soil carbon storage of the soil from 0 to 60cm depth to the change of land use and climate in Ailao Mountain.