“自由主义”产生于17、18世纪的西方的政治哲学的思潮。自由主义产生以来对西方国家的政治、经济、文化产生了深远的影响。而美国作为英国原来的殖民地在深受这一思潮影响的同时又有其自身的不同特点,这一点在美国的政治思想方面的表现尤其突出。本文将从自由主义的界定、哲学基础、宪政理念等方面作出剖析。 “Liberalism” emerged in the western political philosophy in the 17th and 18th centuries. Since the emergence of liberalism, the political, economic and cultural impact of Western countries has had a profound impact. The United States, as the original colony of Britain, was deeply influenced by this trend of thought and had its own different characteristics at the same time. This was particularly prominent in the political thinking of the United States. This article will analyze the definition of liberalism, philosophical basis, constitutional philosophy and other aspects.