Abstract: 【Objective】 The study aims to research the change of soil factors under different degradation stages: non-degradation (ND), light-degradation (LD), mid-degradation (MD), heavy-degradation (HD) in alpine steppe of Bayanbulakto and analyze the rules of soil nutrient in the hope of clarifying the soil stoichiometry characteristics, which might provide a reliable scientific basis for the reconstruction and management of grassland degradation. 【Method】 Using conventional soil chemical detection method to analyze soil organic matter, soil total nitrogen, total phosphorusl, index in Bayanbulak degraded steppe. 【Result】 The soil C , N and P contents of 4 different degraded grasslands decreased by 53.0% , 54.0% and 52.0% , respectively, and the contents of nitrogen and phosphorus decreased by 42.0%-95.0% and 29.0%-43.0% (P＜0.05) . The soil C / N ratio of 0-10 cm, 10-20 cm and 20-30 cm soil layer reached the lowest after severe degradation and decreased by 71.0%, 75.0% and 77.0%, respectively compared with the undegraded soil layer (P <0.05). There was no significant difference between the undegraded and mild degraded soil layers of 20-30 cm (P>0.05). Compared with undegraded grassland, the N / P ratio of 0-10 cm and 20-30 cm soil layer decreased significantly by 64.0% and 59.0% cm after severe degradation. The ratio of nitrogen and phosphorus in 10-20 cm soil layer was higher than that in undegraded soil layer (P<0.05). Soil surface C / N ratio, C / P ratio and N / P ratio were positively correlated with aboveground biomass (P<0.05). P value showed a good correlation with the aboveground biomass scale(P＜0.05). 【Conclusion】 Different degradation stages soil stoichiometry characteristics decrease significantly in Bayanbulak alpine steppe.