Abstract: Maqin County, an important county of animal husbandry in Qinghai Province, hosts more than 13 million mu of naturally available grassland and rich forage resources. In 2022, a 1∶250 000 land (grassland) quality geochemical survey was carried out in the eastern part of Maqin County. This survey represents the first large-scale land quality survey of grassland in the Qingnan region of Qinghai Province, setting a model exemplary role. Based on nutrient content in plants from the surface soil in the survey area, this study assessed the abundance and deficiency of various nutrient elements. The results indicate that soils in the survey area are dominated by first- and second-grade soils in terms of comprehensive geochemical grades of soil nutrients, accounting for 91.68% of the total area. In contrast, third- and fourth-grade soils collectively represent 8.33%, with no fifth-grade soils identified. The generally rich nutrients in the soils provide a solid foundation for the development of plateau-specific agriculture and animal husbandry. The results of this study provide essential foundational information for the planning and utilization of local grasslands, the development of agriculture and animal husbandry with local features, and the restoration of degraded pastures.