This book first introduces the challenges the fiscal and monetary policy faces after China's economy entered the new normal, then expounds the economic theoretical basis, principle, and mechanism of fiscal and monetary policy coordination then analyzes the application mode and existing problems of the coordination and cooperation between China's monetary policy and fiscal policy and analyzes its causes. Finally, it draws lessons from the experience of the United States, Japan, Germany, and other countries and puts forward policy suggestions on the coordination of China's monetary policy and fiscal policy under the new situation.