[Objective] The distribution of carbon, nitrogen and phosphorous in soils under different grassland types and the relationships between different nutrients in Northern Tibet was explored in order to provide a theoretical basis for grassland protection and evaluation.[Methods] Soil samples of different grassland types in Northern Tibet were collected by s-shaped soil sampling method, and the carbon, nitrogen and phosphorus content of the soil was measured by test. Variance analysis and correlation analysis were conducted based on SPSS.[Results] The organic carbon in ridge alpine meadow, alpine shrub meadow and hillside alpine meadow was mainly affected by elevation. The organic carbon increased with elevation while decreased with soil depth. The organic carbon was significantly correlated with total nitrogen, and the correlation coefficient was 0.968(p<0.01). The total nitrogen and organic matter had the same trend in different grassland types. Except alpine swamp meadow, the distribution pattern of available nitrogen and total nitrogen were the same that in other grassland types. There was a significantly positive correlated between available nitrogen and total nitrogen, and the correlation coefficient was 0.439 (p<0.05). Rapidly available phosphorus was significantly positive correlated with total phosphorus, and the correlation coefficient was 0.442. The total phosphorus content was affected by grazing, but the effect of grazing on available nutrients was more obvious.[Conclusion] The carbon, nitrogen and phosphorous of different grassland in Northern Tibet shows a regular change, grassland degradation has a certain correlation with grazing intensity.