Based cn the investigaticn of soil ercsicn by remote sensing and map-making in Northeast China，the types, distribution，intensity=classifing of soil erosion and its features in the regions with different soil- erosive intensity have been dealt with in Songhuajiang valley The harms causing by soil erosion were analysed through surveying the ` typ;ca] 'actual 'example, Ori This basis, the author put forward the measures to con trol soil erosion in this valley,