呼伦贝尔草原植被地带性分布由东到西是草甸草原和典型草原，依次为线叶菊、贝加尔针茅、羊草、大针茅和克氏针茅5个群系，构成了呼伦贝尔不同草地类型与组合，是呼伦贝尔草地主体。该数据集通过开展野外呼伦贝尔贝温性羊草草甸草原长期固定样地植物群落变化研究，收集整理了2009–2015年植物群落特征，包括植物群落总盖度、植物群落自然高度、植物群落多度、植物群落地上绿色干重。用户可以按照调查年份对植物群落特征进行数据检索。呼伦贝尔羊草草甸草原植物群落长期监测数据集的建立与共享，可为全球气候变化和人类干扰背景下开展温性草甸草地生态监测工作、探索该草原类型植物群落特征的动态研究提供数据支持，为深入认识长期围封下草地生态系统响应规律和草地生态系统恢复演替提供理论依据。

The zonal distribution of vegetation in Hulunbuir steppe is meadow steppe and typical steppe from east to west. And there are five different grassland types in Hulunbuir in order: Chrysanthemum tenuifolia, Stipa bayal, Leymus chinensis, Stipa grandis, and Stipa krylosti. These five grassland types constitute different grassland types and combinations in Hulun Buir, and are the main body of the grassland in Hulun Buir. Through the field study on the changes of plant community in a long-term fixed plot of Leymus chinensis meadow steppe in Outer Hulun Buir, this dataset contains plant community characteristics, including plant community coverage, plant community height, plant community abundance, and aboveground green stock of the plant community were collected and arranged from 2009 to 2015. We studied changes in the plant community in the long-term fixed sample plot of Leymus chinensis meadow grassland in Hulunbuir. Researchers can retrieve data on the characteristics of the plant community by survey year. The establishment and sharing of long-term monitoring data sets of plant communities in Leymus chinensis meadow steppe in Hulunbuir is important for continued research. The data can support ecological monitoring of warm meadow grassland and dynamic research into plant community characteristics of this steppe type in the context of global climate change and human disturbance. This study provides a theoretical basis for understanding the response law of the grassland ecosystem and the restoration and succession of the grassland ecosystem under long-term enclosure.