以松嫩沙地1990年、2000年、2010年、2020年4期土地利用数据为基础，分析该区 1990 — 2020年期间土地利用变化特征。结果表明，空间格局上，耕地面积最多，2020年耕地总面积达162 309.32 km2，占研究区总面积的46.04%；其次为林地，2020年林地总面积 96 431.76 km2，占研究区总面积的27.35%。从土地利用变化角度看，建设用地面积逐渐增加，共增加了2 337.43 km2，且建设用地的增加大都是由耕地转化而来。

Based on the land use data of 1990， 2000， 2010 and 2020 in Songnen sandy land， this paper analyzes the characteristics of land use change from 1990 to 2020. The results showed that in terms of spatial pattern， the cultivated land area is the largest， with a total area of 162 309.32 km2 in 2020， accounting for 46.04% of the total area of the study area， followed by forest land， with a total area of 96 431.76 km2 in 2020， accounting for 27.35% of the total area of the study area. From the perspective of land use change， the area of construction land increased gradually， with a total increase of 2 337.43 km2， and most of the increase of construction land came from the conversion of cultivated land. The research results can provide a scientific basis for the sustainable development of land use in this area.

F301.2

吉林省社会科学基金项目(2020B028)。