Grassland, as the main component of terrestrial ecosystem and an important habitat for human beings, provides a variety of services such as material, environment and culture for human beings. Besides providing food, medicine and raw materials for industrial and agricultural production, it is also a support system to support and maintain the life of the earth, maintaining the material and water circulation of life, maintaining biodiversity, purifying the environment, maintaining the stability of atmospheric composition and realizing material circulation. Due to the influence of human activities such as overgrazing and mowing at the end of the twentieth century, there was a "heavy use, light construction" in grassland utilization and management, which seriously damaged grassland vegetation and made grassland production and ecological functions very fragile. To understand the influence of enclosure, replanting, and so on on the mountain meadow community, the typical sample method was used to investigate the mountain meadow plant community, and the influence of enclosure, replanting, and fertilization on the species composition, species diversity, and biomass of the meadow plant community was analyzed, providing a theoretical basis for vegetati.