| After World War II, the U.S. policy towards China evolved and changed with the intensification of the Cold War situation and the deepening of the internal KMT-CPC contradictions. To prevent civil war and help Jiang anti-communist, but the situation is not developed as expected, the Kuomintang troops is vulnerable, torsion of the war situation also makes U.S. policy towards China have to adjust. However, due to the presence of the Cold War mentality and traditional Fu Jiang policy, the United States is difficult to find a solution ideal policy for a time, so the Truman administration adopted a policy of "Its ought to be until the dust settled". The emergence of the term and policy itself has nothing to do until the dust settles, it is the view of Acheson, but it is a realistic policy of U.S.This statement is a negative factor as it refers to wait and see, but the U.S. is actively to practice. In this paper, the evolution of the U.S."When the dust settles" policy before and after the founding of New China to sort out and think, and make evaluations. U.S. policy towards China in this period mainly behaves in the following, Marshall impact on China, Stuart activities in China and the overt or covert intervention on Sino-Soviet relations after the establishment of new China, until the outbreak of the Korean War, the Seventh Fleet of United States Army entered the Taiwan Strait, the United States embarked on the road to interfere in China’s internal affairs again.In the period of "Until the dust settles" policy, the U.S. policy of supporting Chiang anti-communist tone has not changed, but as the situation changes, America looks forward to the uncertainty of the situation in China, and has imagin of the Chinese Communist regime.The Chinese people finally won the independent under the leadership of the Communist Party after centuries of suffering. So they are extremely sensitive to the U.S. policy. One side the United States wants to continue to maintain interests in China, another side America is lack of confidence and friendship to the new regime as the impaction of the anti-communist ideology. This makes the development of Sino-US relations have lost the opportunity to bring the same to the bilateral exchanges and trouble. Sino-US relations involve the interests of all parties, including the two peoples, review the history, look to the future, and we need to study it. |