政治家的演讲通常具有较强的政治色彩,因此,政治演说是批评性话语分析的主要研究对象之一。本文通过运用批评性话语分析和系统功能语言学的理论和方法,对美国总统奥巴马的电台演讲的批评话语分析,来探讨语言、权力和意识形态的关系,展现语篇生产者如何通过语言手段传播他们的意志,从而让读者认识到国家权力是如何通过语言来助其达到政治目的。 Politicians’ speeches usually have a strong political overtone. Therefore, political speeches are one of the main research subjects of critical discourse analysis. This essay explores the relationship between language, power and ideology through the use of critical discourse analysis and systematic functional linguistic theories and methods to analyze the critical discourse of President Obama’s radio speech and show how discourse producers can spread the language Their will, so as to make the reader aware of how the state power through the language to help achieve their political goals.