Abstract: Grassland ecosystems are unassailable associated with global change.In this paper we summarized the research advances in herbage plant phenology and phenological model of grassland.We searched many literatures and found that the changes of plant phenology could reflect some effects of climate change directly.The environmental driving factors such as temperature,light and water would have different effects in controlling the progress of phenology.The development of plant phenological model had strong trends toward dynamic phenological model based on plant development mechanism from statistical model in the beginning.However,less was known about natural grassland phenological model.Some existing phenological models only could be used for specific species simulation,some couldn′t be used for largescale region,and the others were lack of description in development progress.Because of these problems we should enhance the research about the relationship between plant phenology and climate factors,especially water effect.We should explore all the characteristic of grass in every phenology stage and verify the phenological model step by step.An accurate natural grassland phenological model will be benefit for the study of climate change.

Key words: Phenology, Phenological model, Natural grassland, Climate change