[Objective] The study analyzed soil erosion in different stages during the construction of Three Gorges Project in order to give support to decrease soil erosion and to improve land-use plan.[Methods] Wanzhou District of Chongqing City was taken as research region, the original observed data, revised universal soil loss equation(RUSLE) and GIS method were applied to investigate the dynamic changes of soil erosion.[Results] The result showed that from year 2000 to 2012, soil erosion intensity decline first and reached the lowest in 2007, then rose slightly. Severe erosive area decreased by 34.24%, and mild erosive area increased by 7.66%. The spatial distribution of soil erosion grade variation was similar to that of actual soil erosion during the study period. Soil erosion grade variation also had the same distribution characteristics in different period. The most active change of erosive grade concentrated in the area between Tiefeng mountain and Fangdou mountain. The southeast part of the research area had low activity in grade change. Transfer matrix of soil erosion intensity showed that soil erosion intensity declined from 2000 to 2012. From 2000 to 2007, about 76.56% of the research area stayed at its original level; 22.78% of the area downgraded gradually. The second stage, from 2007 to 2012, trend of change in erosion intensity was stable, merely 9.77% of the area transformed to higher level.[Conclusion] In 2000-2012, the soil erosion of the surface at Wanzhou District was gradually, and the soil erosion decreased obviously, but after 2007, the erosion situation rebounded, and the erosion situation in some areas was still serious. There is still a strong need for adopting soil erosion control measures, for improving land use measures, and reducing erosion and raising the level of soil conservation.