In recent years, due to excessive grazing and other irrational utilization of grasslands, the biomass of grasslands has significantly decreased, leading to a series of problems such as decreased forage quality and reduced livestock production, which has seriously affected the sustainable development of the local ecology and economy. In this context, this study used the theory of grassland-livestock balance and takes Ordos grassland as the research object. Based on the modified CASA model, the vegetation NPP was inverted, and the forage yield in the grassland was estimated. Combined with actual livestock-carrying capacity data, the livestock-carrying pressure index was used to measure the grassland-livestock balance status of different grassland types. The results showed that: (1) The average annual forage yield in the Ordos region from 2000 to 2020 was 648.8kg/hm², and the forage yield showed a fluctuating upward trend year by year. The forage yield in the east was higher than that in the west. Under different grassland types, the grass yield of warm steppe and warm meadow steppe was greater than that of warm desert steppe and warm desert. (2) The grasslands in Ordos City have been in an overloaded state for a long time, and the livestock-carrying pressure has slightly increased in most areas. In terms of space, the livestock-carrying pressure on warm steppe and warm meadow steppe in the eastern region was lower than that on warm desert steppe and warm desert in the western region. (3) The changes in livestock-carrying pressure were mainly influenced by precipitation and human grazing, and the livestock-carrying pressure was greater in dry years. After the implementation of the grassland ecological subsidy and reward mechanism in 2011, the grassland has been restored to a certain extent, and the changes in livestock-carrying pressure on the grassland were relatively stable.