Bijie prefecture of Guizhou province is situated on the roof of yunnan-Guizhou plateau.In recent years,soil and water loss in this area is very severe,which results in desertification,de-creese of soil fertility and increase of the area of lower-yield farmland,the phenomenon of pollutingand occupying farmland against the law is widespread the above factors hinder the development ofthe agricultural productivity,Based on analysis of the resons of destruction of land resources.theauthor puts forward the protection policy of farmland resources and a serious of countermeasures,such as huilding terraces in the slop farmland,carrying out comprehunsive control taking small wa-tershed as a unit,regulating land utilization constructure and controlling the population increase.