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The development of international trade theory has experienced two main stages: traditional international trade theory and new international trade theory.New international trade theory rises with the development of economic theory,it constantly introduces new economic concepts into the eld of international trade research,explains the causes of the emergence and development of international trade from the perspective of depth,and greatly promotes the development of international trade theory research.Since the end of the Second World War,the pattern of international trade has not been divided,which is reected in the rapid rise of developing economies and the multi-polarization development of international trade.