The United States and China have agreed export deals worth $US45 billion at the formal start of a state visit by President Hu Jintao.
They include a $US19 billion contract to buy 200 aircraft from Boeing, for delivery between 2011 - 2013.
Another 70 contracts were worth $US25 billion in 12 states. The companies involved include Honeywell, Caterpillar and Westinghouse Electric, a unit of Japan's Toshiba Corp.
US officials said on Wednesday the deals will support 235,000 jobs.
The US trade deficit with China was an estimated $US275 billion last year.