The research made a quantitative analysis using RS&GIS technology synthetically and abstracted five factor such as Slope,RVI,SQI,DVI,LUD as cultivated land quality assessment indicator. By Virtue of PSR framework,the evaluation index system of Guiping City was constructed,and the cultivated land was devided into five grades and corresponding land resource protection suggestions were put forward respectively and on this basis,the improvement of cultivated land resources in Guiping City was discussed.