| As a opening industry, International tourism is a important part of International service trade and a industry faced less trade barrier. The article bases on trade theory (including the theory of comparative advantage ,national competitive advantage theory and development theory of dependence),Analyses trade theory's extension in international tourism.In china, International tourism has been developing very fast, Which can take more than 200 dollars foreign currency each year. But there is some absence on using trade theory to analyse international tourism.The article mainly includes three parts: The first part introduces the concept, character, content and developmeng of international service trade and international tourism; The second part is major part of the article, which use trade theory to analyse international tousim. The third part discusses the case of china. China is a country which has abundant tourism resources, but china need to improve its international tourism competitive power. |