Abstract: The physical traits of land resources like finite in amount, immovability and regional differentiation make it scarce for given purposes. However its multi-function can support and nourish agriculture, as well as generate socio-economic values form the resource and capital perspectives. The contradiction between the limited supply of land resources and increasing pursuit for the maintenance and develop of societal need drives more and more researches into the the balance between utilization of land resources and limitation of natural resource carrying capacity. Based on the protection and maintenance of eco-civilization, this paper carried out a comprehensive evaluation of regional land carrying capacity using aggregate demand- aggregate supply (AD-AS) model from the perspective of economics, from the angle of ecological civilization, this paper discusses the carrying capacity of regional land resources from the aspect of supply and demand, taking Datong City as the case area. The results showed that:①The total demand of the comprehensive carrying capacity of regional land resources is composed of the demand for cultivated land, the demand for construction land and the demand for ecological land, From 2011 to 2015, the aggregate demand for land comprehensive capacity in Datong City was 0.5309、0.5542、0.5770、0.5797 and 0.6030 respectively, and the overall trend was increased; ②The total carrying capacity of land is composed of the supporting capacity of cultivated land, the support capacity of construction land and the ability of ecological support, From 2011 to 2015, the total supply capacity of land in Datong City was 1.423、1.466、2.104、1.531 and 1.509 respectively; ③From 2011 to 2015, the comprehensive carrying capacity of Datong City is overloaded, and the overload is the largest in 2013, and the overload is the smallest in 2015, which indicates that the overloading capacity of land resources in Datong is improving. By using the method of land comprehensive carrying capacity, in the study of the bearing capacity of land resources in a more scientific and reasonable, make people pay more attention to the ecological civilization, may be helpful in giving new and novel references for the establishment of balanced relationships between human and land resources.