An analysis and study on the characteristics of cultivated land dynamic change is very important in protection,growth and utilization of cultivated land.Therefore,it tries to make an analysis on the characteristics of cultivated land dynamic change and its background characteristics as well as spatial distribution of cultivated land in Sichuan province from mid-1990s to 2000,employing GIS technology under the aid of spatial database platform.The research shows that the net decreased wet rice land are mainly turned into dry farming land,people's inhabitation and grassland and the net decreased dry farming land are turned into people's inhabitation and grassland,while most of net increased dry farming land are converted from wet rice land and forst land.The net increased cultivated land are found in slight and mild soil erosed areas as well as areas with slope degree as 4,3 and 5 and the net decreasing of cultivated land mainly happens in areas with slope degree as 1.The net decreased cultivated land are found in the plains,hills and mountains around Sichuan basin with Yaan city,Leshan city,Neijiang city and Chengdu city as the top four places,while the net increased cultivated land are often found on the the mountains of southwestern Sichuan and plateaus of northwestern Sichuan with Mianyang city,Deyang city,Aba Tibetain and Qiang Autonomous Prefecture and Liangshan Yi Autonomous Prefecture as the top four places.