[ Objective ] The aim was to study the space transfer characteristics of cultivated land in Yunnan Provice based on GIS. [ Method] Digital elevation model(DEM) was overlayed with the land type data of each county to extract spatial distribution data of cultivated land in 1986 and 2000 in Yunnan Province based on ArcGIS. SPSS, a famous statistical software, was used to statistical analysis of the relationship between cultivated land change and natural factor, economic factor and social factor. [ Result] The results showed that the quantity of cultivated land decreased of 18 534.5 hm2 by 0.29％ during 1986 - 2000 in Yunnan Province, while the changes of paddy land area was different from that of dry land area. The spatial variation area of cultivated land at horizontal direction showed that the eastern cultivated land area was reduced while the western cultivated land area was increased, and centroid of cultivated land moved westward about 1 306 m and moved northward about 214 m. At vertical direction, the cultivated land changed from basin that the slope less than 8 degree and mountain land on steep slope that the slope more than 25 degree to mountain land on gentle slope that the slope between 8 degree to 25 degree. The main influencing factor leaded to the variation of cultivated land in temporal and spatial was laws, regulations and government acts, while the effects of the other influencing factors were no obvious. [ Conclusion] The study can provide a basis for protection of cultivated land in Yunnan Province in future.%[目的]采用GIS分析云南省耕地空间转移的特征.[方法]在ArcGIS 9.0中,利用云南省1986和2000年的分县土地利用遥感调查数据和云南省的数字高程模型,提取不同时期云南耕地的空间格局数据,并利用SPSS 13.0统计软件分析耕地变化与自然、经济和社会因子的相关关系.[结果]1986～2000年,云南省耕地总量减少了18 534.5 hm2,减幅为0.29%,但水田与旱地的变化情况不同.耕地在水平方向上的变化表现为东减西增,耕地质心向西移动约1 306 m,向南移动约214 m;在垂直方向上,耕地有从地面坡度≤8°的坝区和从地面坡度≥25°的陡坡地向地面坡度为8°～25°的中缓坡地转移的趋势;影响1986～2000年云南省耕地时空变化的主要因子是政策因子(政策法规和政府行为)的变动,其他因子的影响不明显.[结论]该研究可以为云南省今后的耕地保护决策提供依据.
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