Plateau wetlands are important carbon sinks in ecosystems. As an important part of the carbon budget of the plateau wetland ecosystem, soil CO₂ fluxes play an important role in the regional carbon balance. Tibetan pig herding is a unique grazing method in high-altitude Tibetan areas of China. It is an important disturbance factor that causes soil degradation in plateau wetlands and affects the change of soil CO₂ fluxes. A soil CO₂ fluxes automatic measurement system (LI-8100A, LI-COR, USA) was used to detect CO₂ fluxes from the disturbance of Tibetan pig herding and the control (without Tibetan pig herding) in the Bulun, Hamugu, and Yila grasslands in northwestern Yunnan during different seasons. We found that Tibetan pig herding reduced the CO₂ fluxes of the soil and there were clear daily fluctuations. Compared with the dry season, the effects of different grazing methods on CO₂ fluxes were more obvious during the rainy season, with values of 70.4%, 87.5%, and 60.7% for the Bulun, Hamugu, and Yila grasslands, respectively. The correlation of CO₂ fluxes with the physical and chemical properties of the soil and plant biomass indicated that there was a significant correlation between soil bulk density, porosity, pH, total labile carbon, plant biomass, and soil CO₂ fluxes during the control plots. The impact of grazing on the plateau wetland was analyzed by a plant-soil index (PSI). Overall, there was a good linear relationship between soil CO₂ fluxes and PSI in the control plots. This index could be used to predict future changes in soil CO₂ fluxes in plateau wetlands. The results of this study not only effectively estimate soil carbon emissions of a plateau wetland under the influence of a strong grazing disturbance, but also provide theoretical support for strengthening the scientific management of Tibetan pig herding and the protection, restoration, and reconstruction of plateau wetland ecosystems.