批评话语分析是对语篇与社会关系的分析,揭示语篇所传达的意识形态。即体现的是话语,权力,意识形态之间的关系。卡扎菲之死深受社会的关注,本文以奥巴马宣布卡扎菲之死的演讲为语料,以Fairclough的三维模式为指导,从及物性,分类,转换,人称等多方面进行批评话语分析,揭示奥巴马演讲背后的政治立场和意识形态。 Critical discourse analysis is the analysis of discourse and social relations, revealing the discourse of the ideology. That is reflected in the discourse, power, the relationship between the ideology. Gaddafi’s death is deeply concerned by the community. This article uses the speech of Obama’s announcement of the death of Qaddafi as the corpus and with Fairclough’s three-dimensional model as the guide, criticizes discourse from various aspects such as materiality, classification, transformation, personal name, Revealing the political stance and ideology behind Obama’s speech.