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With international trade and international capital to flow in both directions of the rapid development of multinational corporations makes the rapid growth of foreign exchange business, a growing number of companies frequently exposed to foreign exchange risk, coupled with the current international financial markets frequently sharp exchange rate fluctuations, foreign exchange transactions risk has become a major issue of transnational corporations. The beginning of the growing importance of transnational corporations on the foreign exchange risk management and reduce transaction risks, increase business value. This article describes the analysis of transnational corporations and foreign exchange transactions of the three main types of risk: transaction risk, conversion risk, economic risk, as well as the introduction of the causes of foreign exchange risk, with specific case studies and understanding of transnational corporations on foreign exchange risk management practices, knowl