[Objective] To evaluate the seasonal dynamic effects of Pinus massoniana vegetation restoration on soil N2O emissions and nitrogen leaching losses in red soils erosion regions at southern China. [Methods] This study focused on different stages of vegetation recovery in typical red soil erosion areas in Changting county, Fujian province (bare land, 10, 20, and 30-year-old Pinus massoniana plantations, and natural secondary forest). Field devices for collecting soil leachate solutions were used to monitor the NH+ 4-N and NO- 3-N leaching losses in forest soils at different vegetation restoration years. Indoor cultivation methods were also employed to observe the seasonal dynamic characteristics of N2O emission losses. [Results] Soil inorganic N leaching was mainly in the form of soil NH+ 4-N in forest land at different vegetation restoration stages, while NO- 3-N was the main form in natural forest. With the increase of vegetation restoration years, the contents of NH+ 4-N and NO- 3-N in soil leaching solution were not controlled obviously. N2O in forest soil was mainly absorbed by different vegetation restoration stages, and N2O emission rate was positively correlated with soil net nitrification, net ammoniation and net mineralization rate. The N2O absorption of various forest soils showed an increasing trend with the increase of recovery years.[Conclusion] With vegetation restoration in southern red soil erosion areas, soil N2O release is mainly characterized by absorption, reducing gaseous N loss, which is not the primary pathway for N nutrient loss. At the same time, the leaching loss of NH+ 4-N and NO- 3-N in the soil of different stages of recovery of Pinus massoniana was not effectively controlled with vegetation recovery. In the future, we should continue to strengthen the protection and sustainable construction of forest vegetation, avoid excessive artificial development and destruction, and gradually restore the water and fertilizer conservation function of forest areas.