Abstract:The life form spectrum, leaf size spectrum, light and water eco-forms were investigated in understory plants of artificial Cupressus lusitanica forest, Acacia dealbata forest and Alnus ferdinandi-coburgii forest as well as secondary shrub community in karst mountain area in Yunnan. The results showed that phanerophytes was the dominant life form in the three forests, followed by hemicryptophytes. Micro-phanerophytes comprised highest percentage. The dominant leaf size of the three kinds in forests was mesophyl 1. The life form spectrum and leaf size spectrum in the forests were similar to those in subtropical evergreen broad-leaved forest in Middle Yunnan. Among the three plantations, A lnus ferdinandi-coburgii forest is shown to have good hydrothermal condition and species diversity, which is beneficial for vegetation restoration.