Abstract: Hutubi Cow Breeding Farm is localed in the border of the alluvial fan and the paleo-alluvial plain of the northern slope of Tianshan Mountain. The zonal grassland type in this region is desert and the interzonal grassland type is low land meadow. The formation and distribution of grassland types are mainly controlled by topography, ground water and soil salinity.Using methods of TWINSPAN and polythetic hierarchical agglomerative classification, the grassland types are divided into 16 types and their hierarchical classification system is formed. The ecological gradient in this region can be given by DCA ordination and the interpretation of its quantitative environment can aslo be given after multivariate regression analysis. The result shows that the grassland types and their distribution are strongly correlated with soil moisture, soil salinity and soil texture.