Abstract:Soil erosion is one of the global environmental problems restricting the survival and development of human beings. With the development of economy, human activities induce the aggravation of soil erosion and bring about eco-environmental problems in the short time. Therefore, taking Hubei Province as the research area, the CSLE model is used to calculate the soil erosion modulus from 1990 to 2015, and the GIS spatial analysis method is revealed the spatiotemporal characteristics of soil erosion in multiple periods. The results show that Hubei Province mainly has slight erosion, followed by mild erosion, and other grade erosion such as moderate erosion occupies a small area. The areas of mild erosion, moderate erosion, strong erosion,extremely strong erosion and severe erosion decreased by 11 267.0, 497.6, 176.9, 307.7, 313.7 km2 respectively in 25 years, with decreases of 27.39%, 13.85%, 11.79%, 24.88% and 56.04% respectively. The total erosion area first decreased, then increased, and finally continued to decrease. Among them, the area of intense erosion and extremely intense erosion decreased significantly. The changes of erosion intensity in different periods show spatial heterogeneity. Soil erosion was mainly improved in 1990-1995, 2000-2005 and 2010-2015, such as Enshi and Xianning in 1990-1995, Enshi and Shiyan in 1995-2000, Shennongjia forest area, Yichang City and the periphery of Zigui County in 2000-2005, Huanggang and Huangshi City in 2005-2010, Shennongjia forest area and Yichang City in 2010-2015; Their soil erosion conditions are gradually improving, and the improvement of dry land and bare land is the most obvious. Soil erosion was intensified in 1995-2000 and 2005-2010, and the intensification of soil erosion was concentrated in Shennongjia area (1990-2000), Shiyan City (2000-2005), Zhuxi County (2005-2010) Enshi City, Xuanen County and Hefeng County (2010-2015), among which forest land and dry land were the most obvious. The main change areas of soil erosion are as follows:in the past 25 years, the area of mild and above grade erosion in thearea with slope less than 8° has increased year by year, which is closely related to the fact that the negative surface disturbance caused by human activities (production and construction projects, agricultural production of sloping farmland, land use type conversion caused by other human activities) is mainly concentrated in the region with relatively flat topography. The area with a slope of 8° to 35° with mild or above grade erosion has beensignificantly reduced, which is mainly manifested in the remarkable results achieved in the implementation of returning farmland to forests and comprehensive control of soil erosion and water loss.