Foreign exchange control refers to the restrictive measures taken by the state to balance the international payments and maintain the exchange rate of the local currency. It is also called foreign exchange management in China. An international trade policy that restricts imports by restricting international settlement and foreign exchange transactions through laws and regulations.

There are several functions: 1. Promote the balance of payments or improve the balance of payments. 2. Stabilize the local currency exchange rate and reduce the foreign exchange risk in foreign-related economic activities. 3. Prevent capital flight or large-scale speculative capital flow and maintain the stability of the domestic financial market. 4. Increase the country's international reserves. 5. Effective use of foreign exchange funds to promote the priority development of key industries. 6. Enhance the international competitiveness of domestic products. 7. Enhance financial security.