Yunyang county is located in the core zone of Sanxia Reservoir with a complicated terrain, making it typical in its land utilization. This paper makes a case study of Yunyang county, analyzes the present status and historic changes of construction land utilization, selects 10 counties (districts) including Wanzhou district, Liangping county and Fengdu county as comparison , and evaluates the economic efficiency levels of construction lands in Yunyang, and finally presents some approaches to intensive utilization of construction lands, offering a reference to economize the construction lands and enhance their intensive utilization, and to ascertain a direction of land utilization.