作为美国民族精神和主流价值观的集中体现,“美国梦”一直是美国媒体中的一个核心主题。在美国历史的不同发展阶段,“美国梦”的内涵各有侧重,而媒体对美国梦的表达和呈现也不尽相同。本文选择美国历史中的几个重要节点,探索美国梦的内涵演变以及媒体在推动美国梦方面所承担的功能。 As a concentrated expression of American national spirit and mainstream values, the “American Dream” has always been a core theme in the U.S. media. At different stages of the development of American history, the connotation of “American Dream” has its own focus, while the expression and presentation of the American Dream by the media are also different. This article chooses several important nodes in American history to explore the evolution of the connotation of the American dream and the media’s role in promoting the American dream.