Soil fractal dimension can better reflect soil texture and soil nutrient characters.Bayanbulak alpine grassland was taken as the research objective in August 2009.Yang Peiling’s soil fractal model was used to analyze four different degenerate stages(non-degeneration CK and slightly,moderately and heavily deteriorated grasslands).Soil fractal dimension in relation to soil particles,soil physicochemical properties and soil degradation were discussed respectively.Results showed that:(1)Soil fractal dimension varied from 2.573 to 2.635 for the different degradations and increased with the increased degree of degradation.(2)There were significant differences between fractal dimension and different grain levels.Specifically,fractal dimenlion was significantly negatively correlated with sand content(p=0.01),but significantly positively correlated with clay content(p <0.0001).(3)There existed significant negatively correlations between fractal dimension and SOM and total nitrogen content.The correlation between fractal dimension and soil bulk dencity was significantly positive.There was a positive correlation between fractal dimension and soil degradation index.(4)Moderate grazing could promote soil quality,but could not exceed the threshold value.