Abstract: In order to promote ecological protection and high-quality development in the middle reaches of the Yellow River and improve the comprehensive benefits of land resource utilization, based on the relevant data of the middle reaches of the Yellow River from 2000 to 2020, quantitative methods such as land use transfer matrix, land use dynamic degree evaluation and land use gravity center migration model were used to analyze the spatial and temporal evolution characteristics of land use green transformation in the middle reaches of the Yellow River. The results showed that, during the study period, the area of agricultural land in the middle reaches of the Yellow River continued to decrease, with a large amount of agricultural land transformed into forest ecological land and grassland ecological land. The gravity center of agricultural land was distributed in Linfen City, and the migration trajectory was not obvious. The area of industrial production land continued to increase, and the gravity center was distributed in Linfen City and tended to move northeast. The area of forest ecological land, grass ecological land and water ecological land showed an overall growth trend, while the area of other ecological land showed a downward trend. The gravity center of grass ecological land and water ecological land was distributed in the central part of Linfen City, the gravity center of forest ecological land was distributed in Yuncheng City, and the migration trajectories of the three types of ecological land were not obvious. The gravity center of other ecological land in the early and late stages fell in Lyuliang City and Linfen City respectively. The area of living land in the middle reaches of the Yellow River continued to increase, and the gravity center of urban living land was distributed in the southern part of Linfen City, while the gravity center of rural living land was distributed in the northern part of Yuncheng City.

Key words: land use green transformation, land use gravity center migration model, dynamic degree, spatial and temporal evolution, middle reach of the Yellow River