Abstract: With the aid of the 3S technology(RS,GIS and GPS),spatial data of the land use of the Yangbijiang River watershed were obtained.Rastre-conversion and chartographic algebraic operation were conducted of the Yangbijiang River watershed land use map,using a complex method integrating GIS spatial analysis with traditional statistical analysis,to create a new GRID database,of which statistic computation was performed to acquire transfer matrix data of land use variation and soil erosion data of various types of land uses during the research period.Analysis of the soil erosion degrees of various types of land use and their variations revealed that cultivated land,forestland and grassland show great impact on variation of soil erosion intensity.Land use transforming from cultivated land towards forestland or grassland favors decrease in soil erosion intensity,whereas the reverse transformation aggravates soil erosion.