Abstract:Learning the evolution of soil erosion is significant to understanding the response of land types under combinations of elevation, slope and lithology. This study takes the Daning River and Meixi River watersheds in the hinterland of the Three Gorges Reservoir area as examples on the base of remote sensing data from 1988, 2000, 2010 and 2015. Having calculated indices of comprehensive soil erosion intensity and hot spot analysis with the help of RS and GIS techniques, we explore the distribution and evolution laws of soil erosion under the coupling of land use type, such as elevation, slope and lithology, and finally reveal its practical significance. The results show the following:(1) soil erosion in the watersheds is undergoing transformation. Over time, the index of soil erosion intensity decreased gradually, and soil erosion showed an improving trend in different land types between the two watersheds; (2) for the spatial change in soil erosion in the two watersheds, the hot spot area of soil erosion is mainly distributed in medium mountains, steep slopes and limestone areas, and the state of soil erosion in the Daning River Watershed is better than that in the Meixi River Watershed; (3) the soil erosion evolution in the two watersheds occurred in areas with medium mountains, steep slopes and limestone or sandstone, and is similar in slope and lithology, with differences in elevation. The reasion is similar in evolution among different land type areas; (4) land type can affect the distribution of soil erosion. The next research direction will be to explore the relationship between different land types and soil erosion responses under human activities.