[Objective] As an ecological security barrier, Inner Mongolia's agro-pastoral intertwined zone also bears a high proportion of food security, and there is a more serious conflict between ecology and arable land protection. The resilience evaluation of Inner Mongolia's agricultural and pastoral intertwined areas helps to identify the high and low levels of arable land resilience in Inner Mongolia's agricultural and pastoral intertwined areas, and carry out zonal regulation, which helps to formulate targeted countermeasures for the sustainable utilization and protection of arable land. [Based on the toughness theory, 29 flag counties in Inner Mongolia's agricultural and pastoral intertwined area are taken as the research area, and by constructing the “pressure-state-response” model, the entropy value method is utilized to comprehensively evaluate the toughness characteristics of arable land in the agricultural and pastoral intertwined area of Inner Mongolia, and based on the characteristics of combination of toughness level of arable land, the toughness subzone of the agricultural and pastoral intertwined area is divided, and subzone control and management are proposed. zoning, and put forward the zoning control path. [Results] (1)Over the past 22 years, the overall resilience level of cropland in Inner Mongolia's agricultural and pastoral intertwined belt is not high, showing a trend of high in the east and low in the west; the historical changes show that the overall resilience level is on a decreasing trend due to the influence of the climate, and that the resilience of the eastern part of the country has been restored in the near future. (2) Based on the combination of changes in the toughness level of cropland, three regions are divided. The first-level stable cultivation area should strictly abide by the red line of arable land protection, and give play to the function of functional areas for food production. The second-level monitoring and protection area needs to increase artificial inputs and improve the regional mechanization level. The tertiary conservation fallow area should adhere to the land space suitability pattern of appropriate agriculture, appropriate animal husbandry, appropriate animal husbandry, appropriate animal husbandry, and stop the uncontrolled expansion of planting industry. [Conclusion] This study integrates the toughness theory into the protection of arable land, indirectly evaluates the toughness of arable land by analyzing the stability of arable land, and directly evaluates the toughness of arable land by constructing an index system, and concludes that the toughness of arable land in the agricultural and animal husbandry areas of Inner Mongolia is generally low, and that the land remediation and wind and sand management should be strengthened to realize the “precise management” and improve the toughness of arable land.