In order to explore the changes of community vegetation characteristics and stability before and after different grassland restoration， this study took three main types of grasslands （alpine meadow， mountain meadow and temperate grassland） in the eastern Qilian Mountains as the research objects. According to the methods of community investigation， paired sample T-test and curve fitting， the structural characteristics， diversity and stability of communities before and after ecological restoration were analyzed. The results showed that： Comprehensive restoration measures could effectively improve the vegetation coverage， density and biomass of grassland， which showed an upward trend and significant difference （P<0.05）. After restoration， the important value of dominant species Kobresia humilis in alpine meadow increased to 32.76， the important value of dominant species Stipa bungeana in mountain meadow increased from 25.69 to 32.74， and the important value of dominant species S. breviflora in temperate grassland increased to 31.20. Cyperaceae and Gramineae played an important role in the restoration of three types of grassland. The implementation of restoration measures led to the increase of species number and biomass， which changed the grassland population structure and reduced the uniformity of species distribution， so that the Margalef， Shannon-Wiener and Simpson indexes increased， and the pielou evenness index decreased. After restoration， the Euclidean distances of alpine meadow， mountain meadow and temperate steppe were 6.29， 8.85 and 5.39， respectively， and the stability of M.Godron was further improved. In summary， ecological restoration can effectively improve the characteristics and stability of grassland communities in the eastern Qilian Mountains， but the responses of each grassland to restoration effects are inconsistent. It is necessary to pay more attention to grassland changes after restoration to prevent grassland degradation again after restoration.

East Qilian Mountains  /  Grassland types  /  Ecological restoration  /  Community characteristics  /  Species diversity  /  Community stability