[Objective] The effects of revegetation on soil carbon(SOC), light-fraction organic carbon(LFOC) was analyzed to provide background data for rocky desertification restoration. [Methods] Sites with severe rocky desertification land was taken as contrast and using space as a substitute for time, SOC and LFOC in sites with 5, 10, 15, 20-year restoration in Guohua karst rocky desertification area of Pingguo County, Guangxi Zhuang Autonomous Region were measured and their changes along revegetation were illustrated. [Results] SOC and LFOC contents increased obviously after revegetation, especially in 0-10 cm soil layer. The increment of surface soil LFOC storage was much higher than that of SOC storage, suggesting that vegetation restoration on rocky desertification land had a large effect on LFOC. [Conclusion] Vegetation restoration can prevent land rocky desertification and increase carbon circulation.