Evaluation of utilizable land resources will ensure the rational planning, steady area of cultivated land and to fill the demand, to satisfy the development of national economy. It is the conjunction of speed, benefit and potential of land resources utilization. 可利用土地资源评价为规划合理,以供定需,满足国民经济发展,稳定耕地,以实现土地资源利用速度、效益和潜力的统一,为国民经济顺利、健康、稳定发展提供科学的保障。