Trade is the exchange of goods or services on the premise of equality and mutual consent. Although this behavior is in the economic field, it can actually be called a world war in the economic field. This book traces back to the origins of Arab merchants thousands of years ago, and uses easy-to-understand language to paint vivid historical pictures for readers. It tells the story of the rise of European empires and the struggle for maritime hegemony in the Middle Ages, the Chinese Ming Dynasty's fight against foreign predators and the trade of the Qing Dynasty, and the world's great wars. War and the course of the trade war during the Cold War. It summarizes in detail the basic characteristics of trade frictions and conflicts, analyzes the meaning behind trade currency competition, judges the severe situation faced by China's foreign trade under the shadow of today's financial crisis and global economic recession, and explores the new pattern of world trade.