[Objective] We aimed to study and put forward methods for the dynamic monitoring and supervision of regional water erosion based on marked changes in soil erosion factors, this is for improving the mechanism and strengthen the means and strict accountability of their comprehensive supervision, in order to provide effective methods and fine data for formulating precise policies regarding supervision, law enforcement, inspection, supervision, and illegal investigation.[Methods] Based on a comprehensive analysis of the main work progress and existing problems in current soil erosion supervision, using high spatial accuracy and high-potential data, such as high-score remote sensing images, pre-design data of soil and water conservation control projects, and production and construction projects, we took soil erosion plots as units to accurately identify the marked changes in soil erosion factors, interpreted and recognized the marked changes in erosion factors, scientifically calculated the changes in soil erosion intensity and area, and determined the causes of the changes.[Results] The marked changes in erosion factors refer to the local change to a number of soil erosion factors in the region, which presents obvious identifiable and monitorable characteristics. The marked changes are mainly reflected in the changes in land surface gradient, land use type, soil and water conservation measures, vegetation coverage, and so on.[Conclusion] The present technology and methods for the dynamic monitoring of soil erosion based on marked changes in erosion factors are especially suitable for the interannual monitoring of soil erosion and its follow-up supervision and management.