Abstract: The structure and function of homegarden of Dai nationality in Xishuangbanna are studied through the rapid rural appraise(RRA),participate rural appraise(PRA) and input/output analization.Eight models of homegarden in Manting Village are put forward.Their structure,economic benefits and comparison with rice crop are analysed.The results show that the economic benefits of homegarden is 7.5 times more than that of rice.Homegarden model is an ecosystem with high benefits.