The entry into force of the Paris Agreement marks the transition of the global climate governance from the negotiation to the compliance. However, that does not mean global climate risk is under control, but rather faces new challenges. In this paper, the three shortcomings of the Paris Agreement are identified, Trump administration's weak climate willingness and their consequencesare are analyzed, and the climate policy possibility of the United States in the future are discussed. It's found that the Paris Agreement has three inherent deficiencies and thus the effectiveness of the Paris Agreement during the implementation process was still dependent on the compliance willingness and compliance capacity of the Parties. Trump administration's climate retreat could have negative impacts on the Parties' compliance willingness and compliance capacity. However, those adverse effects are only short-lived. The status of the United States in the international structure and its established low carbon transition trend will jointly determine Trump administration's withdrawal will not fundamentally shake the Paris Agreement. In the long run, the intention of the United States for global leadership, the domestic dynamics to address climate change, and the moral pressures from outside will inevitably lead the United States to return to the Paris Agreement.