宁夏河东沙区是中国北方农牧交错区具有过渡性地域特征的沙区，认识当地土地沙漠化发展的规律，有助于协调区域人地关系和指导生态建设工程实施。利用Landsat数据提取宁夏河东沙区2000、2005、2010、2015、2020年5期沙漠化土地信息，结合重心迁移模型分析其时空变化特征，并采用多元回归残差分析方法将气候变化和人类活动对区域沙漠化演变的影响进行剥离和重新组合。结果表明：2000—2020年，宁夏河东沙区沙漠化总体面积减少，沙漠化程度减轻，沙漠化呈逆转的趋势，区域北部沙漠化程度比南部严重；各类沙漠化土地的重心整体北移，南部沙漠化逆转程度比北部显著；区域沙漠化逆转主要受气候变化和人类活动综合影响。

The sandy region to the east of the Yellow River in Ningxia is a transitional region in the agro-pastoral ecumenical zone in northern China. Understanding the law of the development of desertification in this region is helpful to coordinate the local man-land relationship and guide the implementation of ecological construction project. The Landsat data were used to extract the information of desertification land for five periods of 2000， 2005， 2010， 2015 and 2020 in the sandy region to the east of the Yellow River in Ningxia， then the temporal and spatial characteristics of desertification land were analyzed by combining the barycenter transfer model， and the effects of climate change and human activities on regional desertification evolution were stripped and recombined by multiple regression residual analysis method. The results show that the overall area of desertification land in the sandy region to the east of the Yellow River in Ningxia decreased， the degree of desertification was reduced， and the desertification was reversed from 2000 to 2020. The degree of desertification in the northern part of the region was more serious than that in the southern part. The barycenter of all kinds of desertification land moved northward， and the degree of desertification reversal was more significant in the south than in the north. Regional desertification reversal is mainly influenced by climate change and human activities.