This paper gives a general overview of rationale of tropical agricultural circular economy. On me basis of ecological economic theory, circular economy is a new model of economic development which aims at realizing reducing of resources use, reuse of products and recycling of wastes, conforming to the principle of 4R. It is to make economic system melt into me process of cycle of material of natural ecological system harmoniously. This paper introduces the advantages of developing tropical agriculture in Hainan Province, the main problems existing in the development and mo main models of sustainable tropical agricultural development in Hainan Province at present. 9 typical models of tropical agriculture circular economy in Hainan Province are listed in particular, including compound ecological project of forestry and animal husbandry, three-dimensional planting model of plantation, multilayered structure of eucalyptuses, sustainable agriculture model of sightseeing, the model of using animal manure. precision tropical agriculture model. clean production model of tropical agriculture. deep processing model of tropical agriculture products. and the model of ecological agriculture industrialization. Corresponding countermeasures and suggestions-are put forward to promote development of tropical agriculture circular economy in Hainan Province as follows: take actions that suit local circumstances, exert advantage and exploit potential; give full play to advantage of integration of production, teaching and research, and promote agriculture by applying scientific and technological advances; the whole staff participate and strengthen construction of soft environment and hard environment.