Abstract: The changes in soil erosion are affected by various factors such as land cover, vegetation coverage, and terrain and localforms. We selected Xinhua county as a typical regions of Hunan province for research,based on surface erosion grading indicators, universal soil loss equation models, and slope factor, established soil erosion risk evaluation plan used on land use data and digital elevation model, completed the calculation of soil erosion intensity of Xinhua county in 2020, and completed the time and space analysis combined with soil erosion data in 2008. The main findings are as follows:Compared with 2008, the amount of soil erosion in Xinhua county increased slightly in 2020, but all belonged to mild soil erosion. The distribution of mild, intensity, extremely intensity, and severe soil erosion in the two years is basically the same. Due to afforestation in barren mountains, areas with severe soil erosion in 2020 have been improved, at the same time, due to the increase in shrubs and dry farm, moderate soil erosion in some areas intensified. This method can quickly monitor the trend of soil erosion, providing relevant departments with support and data support, and providing favorable services for the improvement of the ecological environment.

Key words: land use, soil erosion, slope, gradation of soil erosion, spatiotemporal analysis