The development of economic and trade relation between China and America is not only important for the two governments, but also important for the world economy. However, in recent years, Sino-US trade frictions have happened frequently, which affected the healthy development of the two counties and the world economies. Therefore, it is a major issue for the world economy development to analyze the reasons of Sino-US trade frictions from an economic view and find the effective measures for easing the trade frictions.