I ABSTRACT If developing countries implement purely parative advantage strategy and develop international trade, have not narrowed the economic disparity with the developed country, has fallen into parative advantage trap instead. The reason which presents this kind of situation lies in what the traditional trade theory is emphasized is parative advantage and have ignored such dynamic trade interests as industrial structure adjustment technological progress and system innovation ,etc. If developing countries carry out such parative advantage strategy for a long time, one country's industrial structure not only can't be upgraded but also original industry structure will be solidified so that developing countries lie in unfavorable status of international division. The Industry-trade theory is important because this theory has announced that hide