结合新贸易理论的发展,从分析框架、分析侧重点以及分析准确性三个层面指出了传统贸易理论在解释当今国际贸易现实问题时遇到的新挑战,在此基础上,通过引入一个基于“国家×要素×生产片段”框架下的产品内贸易模型,分析了产品内贸易的基础,工资与就业效应以及福利效应。最后,就产品内贸易与传统贸易模式下发达国家与发展中国家之间的贸易关系进行评述。 Combined with the development of new trade theory, this paper points out the new challenges encountered by traditional trade theories in explaining the current realities of international trade from three aspects: analytical framework, analytical focus and analytical accuracy. On this basis, The intra-product trade model under the framework of “country × element × production segment” analyzes the basis of intra-product trade, wage and employment effects and welfare effects. Finally, the article reviews the trade relations between developed and developing countries under intra-product trade and traditional trade modes.