In present study, we investigated soil texture and soil fractal dimension with the soil particle size distribution at 44 sites along a 300 km transect across the alpine grassland of northern Tibet,China. The aim of this reseachis to explore the special characteristic of soil fractal dimension in the northern Tibet. The results showed that the main soil textures in the study area were sand, loamy sand and sandy loan. The fractal dimension ranged from1.979 to 2.743,and the mean value was 2.492. The fractal dimension was significantly difference among soil textures. The fractal dimension value decreased withthe coarser soil texture. Sand, silt and clay contentof the soil was 77.65％, 18.2％和4.15％,respectively. For the soil of alpine steppe in the northern Tibet, the fractal dimension of soil PSD was decreased significantly with sand content,but increased with silt and clay content. The result indicated that the fractal dimension of soil particlesize distribution could be used as an important index of soil texture in the northern Tibet.