近年来,西方学术界出现“有效违约”理论是否可适用于国际贸易法特别是WTO法的争论。本文简要回顾该理论支持者和反对者的不同观点和理由。某些学者基于经济学逻辑支持该想法,其他学者则基于众多理由对此予以批判。本文指出将该理论引进国际法所面临的诸多困难。虽然激烈的争论仍将继续,但对WTO实践不会产生实质性的影响。 In recent years, the emergence of Western academic “effective default ” theory can be applied to the international trade law, especially the WTO law debate. This article briefly reviews the different viewpoints and rationales of the proponents and opponents of the theory. Some scholars support this idea based on the logic of economics, others criticize it for many reasons. This article points out the difficulties in introducing this theory into international law. Although the heated debate will continue, it will not have a substantive impact on WTO practices.