Soil erosion has always been one of the hot issues that China has paid attention to when developing regional ecological environment management. With the support of RS and GIS technology, this study analyzed the characteristics of soil erosion intensity under different land uses, altitudes and slope conditions in the Sunshui River Basin of Liangshan Prefecture based on the RUSLE model, and quantitatively evaluated the spatial characteristics of soil erosion. The results showed that:(1) The average soil erosion modulus of the Sunshui River Basin was 1 954.32 t/(km²·a), and the areas with severe soil erosion were mainly concentrated along the mainstream of the Sunshui River and its tributaries. (2) Moreover, the slope farmland and middle-cover grassland were the main types of eroded land use in the watershed. Soil erosion in the 2 000~3 000 m altitude zone of the basin was more serious, with an average soil erosion modulus exceeding 2 000 t/(km²·a). (3) Furthermore, the soil erosion modulus increased with the increases of slope, and 15°~25° was the most severely eroded zone in this watershed. We expect that these research results could serve the water and soil conservation and management work of the Sunshui River Basin in Liangshan Prefecture, and provide certain theoretical support for the realization of rural revitalization.