Abstract: Classification of agroforestry(AF) is necessary in order to provide a framework for evaluating AF systems and disseminating action plans for its developmemt.Based on the inventory of existing AF systems in tropical areas,Yunnan,China,and the high-grade classification of AF systems,this paper presents the structural classification of AF systems of three-grade subsystems(Depending on the purpose of classification),types(The same arrangements of AF components and land management) and models(The same species combination).In addition,ecological and management agroforestry systems have been grouped.