The phenological characteristics of nine typical alpine meadow plants were studied by using the phenological data of Haibei animal husbandry meteorological station from 1997 to 2016 in the northeast of Qinghai-Tibetan Plateau,some problems in the phenology study of Qinghai-Tibetan Plateau were analyzed combined with the characteristics of phenological changes. The results showed that: (1) Most of the 9 dominant plants returned to green between the 100th and 115th of the phenological period,and between the 265th and 285th,they turned yellow. The time of flowering varied greatly,from the 120 th to 230 th. (2) There were no consistent regular changes of the 9 species in the phenological periods of dominant plants,such as greening,yellowing and flowering, indicating that the response of plants to climate change has obvious inter-species differences. (3) The interspecies differences would change the community structure,and the changes in community structure would reshaping the inter-species relationship of the habitat,the interaction between plants and climate change in the longterm process dynamically adjusted the basic stable coupling relationship. A large number of phenological studies based on remote sensing data have weakened the disclosure of the differences in phenological changes.