In the first hundred days of Donald Trump's presidency, he pushed forward multiple policies with high efficiency and a strong style, showcasing his 'America First' governing philosophy. In terms of the economy, he signed executive orders to promote American manufacturing, initiated tax reduction plans, and relaxed business regulations in an attempt to boost domestic demand and employment. At the same time, he strengthened border security, promoted immigration restrictions, and pushed for the construction of the border wall with Mexico, sparking heated discussions both domestically and internationally. In foreign affairs, Trump displayed a tough stance, re-evaluating trade agreements and military deployments abroad, changing the traditional U.S. diplomatic strategy. While supporters believe his actions are decisive and reforms clear, critics argue that his policies are too radical and have caused social divisions. His hundred-day performance is both controversial and marks the beginning of a new political style.