Based on tomato and cucumber in Shouguang of Shandong province and Haikou of Hainan province,this paper uses cost data from "Vegetable Production Cost Statistical Yearbook 2011" and interview materials from vegetable dealers as well as isocost principle to divide the economic borders into South-to-North and North-to-South vegetable transfer.It is concluded that the economic borders of South-to-North and North-to-South vegetable transfer did exist.Because of the difference between southern outdoor and northern greenhouse vegetable resources,there are different economic borders among different vegetable varieties.Therefore,this paper proposes several suggestions,such as vegetable cultivation planning should be differentiated bewteen southern and northern China according to different seasons and varieties.In addition,it is necessary to build a nationwide vegetable information platform.