The grassland in Inner Mongolia, one of the largest remaining grassland ecosystems in the world, is extensive and covers an area of up to 68% of the entire region. Recently, with the increasing needs of livestock products, the ecological function of the grassland is severely degraded by overgrazing. The effect of grazing has become an urgent and crucial issue in the study of grassland ecology. The early researches mainly focused on the effects of grazing on the productivity, community structure and biodiversity of the grasslands through the browsing, trampling around and excretion of livestock. Focusing on C4 soil or plants, only a few studies have considered the effects of grazing on the stoichiometry traits of soil and plants. The mechanism by which grazing affects the stoichiometry traits of soil and plants is far from clear. For this issue, we carried out a study considering the role of grazing on the stoichiometry traits of soil and plant at both population and community scales. We determined the C, N, P content and the C/N ratios of plant and soil to explore how grazing affects the stoichiometry traits and nutrient cycling rates in an ecosystem. We found that: (1) On community scale, C, N, P content of the leaves had no-significant difference between the grazed and the exclosure grassland; however, on species scale, the N content in the grazed grassland was significantly higher than that in the exclosure.(2) Grazing significantly decreased soil total carbon(TC), total nitrogen(TN), soil organic carbon(SOC) and available phosphorus, increased the nitrate nitrogen, with no effects on total phosphorus (TP) and ammonium nitrogen.(3) The C/N ratio of the plant in grazed grassland was significantly lower than that in the exclosure, suggesting higher decomposition rate of litter and quicker nutrient cycling rate of the ecosystem. In conclusion, our study indicates that plants can adapt to varied environments caused by grazing through choosing suitable strategies of nutrient using.