Since the Trump administration took office，U.S.interest in Latin America and Caribbean （LAC） has gradually returned. The current administration follows the basic spirit of the US policies towards LAC and mainly uses such policy tools as diplomacy，trade，immigration，remittances and foreign aid to intervene and control LAC. In terms of the effects，the new policies play a descending role on LAC from north to south. That is，Mexico and Central America and the Caribbean became the most affected sub-region，while South America was less affected. The potential impact of trade and remittances on LAC is wider than that of migration and development aid. On the diplomatic front，LAC’s leftist governments have suffered most. Affected by Trump’s new policies，LAC countries may strengthen the external cooperation to offset the negative impact of U.S.policies，and realize a diversified development in the region. The Asia pacific region including China will become one of its inevitable rational choices.