Anaphalis lactea and Saussurea hieracioides are the main species of alpine meadow in Gannan. The study uses a point pattern analysis method through field community surveys, analysis of spatial distribution and interspecific correlation of A. lactea and S. hieracioides populations with different altitude gradients (2 900 m, 3 500 m, 3 800 m) by using Riples K function. The aim is to understand the dynamics of the alpine meadow population and the development and succession trends. The results showed that： (1) there were significant differences in the distribution of the populations of A. lactea and S. hieracioides on three elevation gradients in the alpine meadow of Gannan. With the increase of altitude, the plant number, coverage and biomass of S. hieracioides population decreased gradually. However, the population of A. lactea increased at first and then decreased. (2) The population density of different elevation gradients is obviously different. The density of S. hieracioides population was 2 900 m > 3 500 m > 3 800 m, the density of A. lactea population was 3 500 m＞2 900 m＞3 800 m. (3) In the 2 900 m altitude meadow, A. lactea population aggregated and distributed in the range of 0-1.9 m, randomly distributed in the range of 1.9-3.9 m, and evenly distributed in the range of 3.9-5 m, S. hieracioides population aggregated and distributed in the range of 0-3.5 m, randomly distributed in the range of 3.5-5 m； In the 3500 m altitude meadow, the population of A. lactea was randomly distributed in the whole study range, while the population of S. hieracioides showed aggregated distribution; In the 3 800 m altitude meadow, the population of A. lactea was aggregated in the range of 0-4.1 m, and the population was randomly distributed in the range of 4.1-5 m with the increase of the research scale, and the population of S. hieracioides showed random distribution in the range of 0-0.6 m and 4.4-5 m, but in the range of 0.6-4.4 m, the population of S. hieracioides showed aggregated distribution. (4) In the 2 900 m altitude meadow, there was no correlation between A. lactea and S. hieracioides populations in the small scale of 0-1.9 m, but negatively correlated in the larger scale of 1.9-5 m; In the 3 500 m altitude meadow, the two populations showed no correlation; In the 3 800 m altitude meadow, there was a positive correlation between the two populations. The results showed that the distribution patterns of A. lactea and S. hieracioides populations were closely related to the change of elevation gradient, and the response strategies of different populations to the change of elevation gradient were different.