Abstract: Quantitative classification and ordination were applied to the plant communities in the region of Haibei Alpine Meadow Ecosystem open experimental Station. The results have shown that: when correlation coefficient R= 0.85, sixty-four plots were divided into twenty-three types of plant communities every type of which has distinctive characteristics in structure, species composition, ecological conditions and geographical distribution. The results of ordination showed that coordinates of plant communities have close relation with altitude, soil temperature and soil potential.