The U.S. economy is highly developed, the production scale is huge, the production technology is leading, and the department structure is complete; Agriculture and industry are developed and advanced; Road, railway, water transport, aviation technology and volume are ranked first in the world; The second largest foreign trade in the world; The financial industry is very developed; The economy has long ranked first in the world, with a per capita GDP of nearly 50,000 US dollars, ranking first in countries with a population of more than 50 million (inclusive), and is the most important economy in the world.