Abstract：Upon coming into power, Trump government announces to withdraw from the Paris Agreement, which imposes a heavy blow to the global climate governance. In history, America's climate policy presents a great instability. The climate policy of Trump government shape a reversal of Obama administrations positive policy to cope with climate change, causing the comprehensive regression of the U.S. climate policy in three major aspects: the abolishment of clean energy plan, the withdraw from the Paris Agreement and the returning to traditional energy policy, which once again reflect the “cyclical” and “changeful” nature of U.S. climate policy. We need to systematically interpret the political and economic drivers behind Trump government's climate policy. This paper takes into account three different motivations and development trends of politics, economy and society. Furthermore, domestic climate governance, further development of the Paris Agreement and the global climate pattern and other aspects are referred to rationalize the extension of Trump's policy impact. This paper proposes that under the existing U.S. policy environment, China is supposed to strengthen cooperation with the United States in traditional energy, infrastructure investment, energy market and global natural gas market, green finance, climate financing and so on, to maintain Sino-American climate cooperation. China can also actively seek global climate system power to maintain and enhance its own interests and aspirations in the climate field.