[Objective] In order to provide a theoretical guidance for the ecological management of plantations, the soil erosion law of young plantations under different forest ground clearing methods were investigated. [Methods] Based on the observation data of runoff plot from 2018 to 2020, the soil erosion laws between two forest ground clearing methods (control burning and no burning) in a clear-cutting site of 30-year-old Pinus massoniana plantation in Southern Guangxi Zhuang Autonomous Region were compared. [Results] ① The impacts of forest ground clearing method on the soil erosion decreased sharply with the increase of forest land restoration after burning. In the first two years after control burning, the amount of soil erosion was significantly higher in the control burning plots than in the no burning plots (p＜0.05). ② Control burning reduced the minimum rainfall for surface runoff, and with the increase of rainfall amount, the soil erosion at burning plots was significantly greater than that at the no burning plots. [Conclusion] In the clear-cutting site of Southern Guangxi Zhuang Autonomous Region, the soil erosion was mainly occurred in the first two years after control burning, thus it is crucial to prevent soil erosion during this period.