As the effects of the economic stimulus faded and resistance of U.S.exports because of the global economic slowdown，the U.S.economy will decline again after it rebounded in the second quarter of 2008. With the negative effects of financial crisis on the economy especially consumption continue to expand in the United States，the U.S.economy from the second half of 2008 to the first half of 2009 will be very weak，the slowdown in the US economy brought about by consumption is likely to lead to recession. We expect that the U.S.economy will break away recession in the latter part of 2009 with the housing and financial markets stabilized，then it will experience slow growth about two to three years. In 2009 the U.S.economy will face serious challenges. US economy is expected to be negative growth of 0.5 percent.