Abstract: By researches of the change and driving mechanism of cultivated land in underdeveloped area,the paper provides theoretical support for sustainable development of cultivated land in that area.Using the principal component analysis,this paper analyzed the relevant data and came to the conclusion that there are three factors that influent the change of cultivated land in Xinyang City,the economic development,the living standards of residents and agricultural incomes.There are the same factors and different factors that influence changes of cultivated land in both developed and underdeveloped areas.In the end,this paper proposes some policies for sustainable development of cultivated land in Xinyang city.