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.