Abstract: Ailao Mountain is located in the central Yunnan region, affected by the southwest monsoon, there are mid-mountain moist evergreen broad-leaved forest vegetation in the altitude range of 2000-2600m. In this area, set on the long-term monitoring data of mid-mountain moist evergreen broad-leaved forest in Ailao Mountain comprehensive monitoring field(ALFZH01AC0_01) for long-term ecological monitoring, it has important scientific value. This dataset uses monitoring data in 2005 and 2010 in samples, by integrating the monitoring data of species composition and community characteristics of forest plant communities in tree layer, shrub layer, herbaceous layer, inter-layer epiphyte (/parasitic) and interlayer vines, a total of 174 species were obtained, belonging to 70 families and 129 genera. The top 5 families with the largest number of species were Liliaceae (10 species), Rosaceae (9 species), Hydrosauridae (9 species), lauraceae (6 species) and theaceae (6 species). The first five genera are Ilex (5 species), Symplocos (5 species), Elatostema (4 species), Impatiens (3 species) and Carex (3 species). The main plant life forms were herbaceous (56 species), accounting for 32.36%; there were 41 species of shrubs, accounting for 23.69%; there were 28 species of trees, accounting for 16.18%. The floristic components of the plot species were mainly tropical Asian species, accounting for 52.02%. According to the Chinese vegetation classification system, the plant alliance in the plot were classified as Castanopsis wattii + Schima noronhae + Machilus gamblei - Fargesia wuliangshanensis - Plagiogyria pycnophylla Evergreen Broadleaf Forest Alliance

Key words: mid-mountain moist evergreen broad-leaved forest, Ailao Mountain, long-term monitoring plot, species composition, community characteristics