Data sources include mainly MSS，TM, ETM and CBERS，together with DEM，China’s geological map，terrain map and land use map. Through automatic information extraction，naked-eye and computer aided interpretation and field work，the authors compiled the land erosion map of four stages. Erosion change information was extracted by using the technique of GIS space analysis. The statistic results show that the area of land erosion in the Yellow River Drainage Area has reached 60% of the whole area. From 1975 to 2000, the aggravated area was larger than the alleviated area; from 2000 to 2007，the alleviated area was larger than the aggravated area.