采用GIS技术和统计分析技术,基于1984、1992和1995～2001年土地利用图件和数据,分析了1984年以来北京丰台区土地利用变化历史过程及其空间分异特征。土地利用变化的基本特点是农业用地面积大幅度下降,非农用地面积快速增加,且随着时间的推移,变化高峰地域在由内向外传递。对1999年土地利用类型数据与经济产值数据匹配结果表明:土地经济产出效益巨大差异的存在是驱动丰台区土地利用从农业用地,尤其是耕地向非农业用地转化的最大动力所在。利用1992～2001年的非农业用地与固定资产投资、人口,二、三产业增加值进行的相关分析显示,固定资产投资、人口增长和第二产业的发展对非农业用地扩展有着显著的作用。

Based on the land use survey maps and data of 1984,1992,1995-2001,and assisted by spatial analysis techniques of GIS and statistic analysis methods,the spatial-temporal process and differentiation of land use change since 1984 in Fengtai district of Beijing were analyzed.Using the data of land use and economic output,the benefit differentiation of economic output between different land use types was calculated in 1999.And according to the data from 1992 to 2001,a correlative model between non-agricultural land use and fixed asset investment,population,secondary and tertiary industries was set up.As a result,this paper found: （1） The total area of agricultural land-use decreased continually,and the decreased area was 8968.76 hm²,with 527.57 hm² of annual average and 3.91% of annual average decreased rate from 1984 to 2001,of which the decreased area of farmland and grassland was much larger.But that of non-agricultural land-use increased speedily with years,and the annual increased area and rate were respectively 569.34 hm² and 4.4% in 1984 to 2001,of which the main increase types were urban & town land and industrial & mining areas. （2） During 1984 to 1999,the spatial different features of land-use change in the district was very remarkable.Along with temporal process,the peak areas of land-use change composed of agricultural land decrease and non-agricultural land increase have been transferred away from center city since 1984.The peak areas of land-use change were between circle-road 2 and 3 in 1984-1992 and between circle-road 3 and 4 in 1992-1999.And predictably,the peak areas will be between circle-road 4 and 5 in the coming 10 years. （3） The comparative analysis of economic output benefits between different land-use types shows that the distinct differences of economic output benefits are pivotal powers of driving land use conversion from agricultural land in nonagricultural land.During 1992 to 2001,the total asset investment,population growth and secondary industrial development are three key factors enlarging non-agricultural land area.