An analysis has been made on dynamic relationship among the population economy and ecology in Guizhou province。Up to the end of 1988,soil erosion area covers 43.5%of theprovince it is 2.1 times more than that of 1952.The Wu river the South-pan and North-pan river watershed are the most serious areas with soil and water loss in Guizhou province Soil ero-sion on hillslope land is the first to be affected on erosion area and quqntity It has been indicated that the basic reason of soil and water loss is enlarged by population growing and grain inadequate in the province Soil and water loss lead the degradation of regional economics system and natu-ral disasters sush as drought and waterlogging to be more and more frequent and serious Now soil erosion bas become an important obstacle for further economic development and impover-ished an origin in rural district In accordance with sustainable develo;ment the countermeasures to prevent and control the soil erosion in Guizhou province are proposed