[Objective] A coupling and coordination model of sustainable intensification and scale of cultivated land was studied to provide scientific basis for formulating policies such as territorial spatial planning, rural revitalization and cultivated land protection.[Methods] Actual land use for a study area in Inner Mongolia was used to construct an evaluation index system of sustainable intensification and scale of cultivated land by the entropy method, and the sustainable intensification and scale of cultivated land were measured by the multi-factor comprehensive analysis method. A coupling and coordination analysis was carried out according to the evaluation results. Based on the evaluation results and regional status reported in the study area, we put forward specific suggestions for the utilization and protection of cultivated land in Inner Mongolia.[Results] The comprehensive level of cultivated land intensification in Inner Mongolia from 2006 to 2021 was between 0.218 and 0.370, showing an overall upward trend. The level of cultivated land intensification was higher in the east and west, and lower in the central region. The differences in cultivated land intensification level among all of the cities were small, and the utilization degree and output effect of cultivated land had a significant influence on the level of cultivated land intensification. The comprehensive level of cultivated land scale fluctuated between 0.433 and 0.532, showing a trend of initially increasing and then decreasing. The spatial distribution characteristics were irregular. There was a large difference in the scale level of cultivated land among the cities, and the shape and area of cultivated land patches had a high contribution to the scale level of cultivated land. During the past 15 years, the coupling degree of cultivated land intensification and scale in Inner Mongolia gradually developed from the run-in stage to the high-level run-in stage, and the coupling degree of cultivated land intensification and scale continued to increase. The coupling degree of cultivated land intensification and scale has advanced from the verge of disharmony and barely coordinated to primary coordination and intermediate coordination. However, 33.33 % of cities were still in the barely coordinated stage, and the spatial distribution pattern was generally higher in the eastern and western regions and lower in the central region.[Conclusion] There is room for optimizing the cultivated land utilization level in Inner Mongolia. More attention should be given to the scientific utilization of cultivated land, improving the planting environment, and attaching equal importance to the utilization and protection of cultivated land to promote sustainable and high-quality agricultural development in Inner Mongolia.