Compared with floating exchange rate, fixed exchange rate provides a more stable environment for international trade and investment, reduces exchange rate risk, facilitates the accounting of import and export costs and the profit evaluation of international investment projects, thus contributing to the development of foreign trade and promoting the foreign economic expansion and capital output of some western countries. However, in the turbulent period of the foreign exchange market, the fixed exchange rate system is also vulnerable to the impact of international hot money, resulting in turmoil and chaos in the international foreign exchange system. When a country's balance of payments deteriorates and international hot money suddenly turns from the country to foreign currency, the country has to take out gold foreign exchange reserves to supply in the market in order to maintain the exchange rate boundary, resulting in a large loss of gold and a sharp drop in foreign exchange reserves. If the exchange rate cannot be stabilized after the huge loss of gold reserves, the country may eventually take legal depreciation measures, thus making the entire exchange rate system and capital system extremely chaotic and turbulent. After a period of time, the foreign exchange market and the monetary systems of various countries can be relatively calm. Before the relative calm was restored, import and export traders often took a conceptual attitude towards ordering, which led to the termination of international trade in some procedures.