Study Of Land-use Optimization In Urban And Rural Based On Land-use Safety

China is at the stage of rapid urbanization, with the rapid development of urban population and industrialization and the demand for non-agricultural land-use increased. As result, the plowland are decreasing and the contradiction between plowland and human is intensifying. However, without the intelligent planning and optimum distribution of land resources, blindly increment of urban construction land will increase the danger coefficient of land-use in town and country. Using Nanning city as example, this paper considered the land use structure and its optimization of whole city ,there were main conclusion and innovations:According to the research of land-use structure and optimum distribution in domestic and foreign, the paper studied the land-use structure of Nanning by using entropy of information, and compared it with other cities such as Guangzhou, Jinan. Based on these researches, the paper showed out the current situation and features of land-use. Then the paper analyzed the temporal and spatial variation of land-use, the main problem and principal factors which impact on the land use structure.The paper studied the relationship between land-use safety and land-use in town and country, and analyzed all kinds of influence factors of land-use , such as terrain, geology, plowland quality, tourist resources, mineral resources and socio-economical conditions.In order to increase safety of land-use, the paper selected six evaluation factors including terrain, geology, plowland quality, tourist resources, mineral resources and socio-economical conditions, and nine sub-index such as grade, aspect, geologic hazard, water resources, plowland quality, tourist resources, mineral resources, population distribution and traffic distribution. Then Analytical Hierarchy Process (AHP) and Delphi method were also introduced to define factor weight. Also we had the division of safe degree by using map algebra of GIS.Based on the land-use safety division, the paper optimized the number of structure of land-use by linear programming, and then the space structures of land-use was optimized by re-development with GIS. Finally, the paper put forward rational proposals how to develop the land resource.