Abstract:  Political speech has always attracted much attention in critical discourse analysis. Theresa May made a short speech about terrorist attack in London. Adopting the perspective of Critical Discourse Analysis and following "Ideology Square" theory framework, this study is to make a critical discourse analysis of this speech. This study reveals how the speaker takes advantage of the linguistic tools to build up two contrastive identities, "us" and "others". Moreover, this study also explores the ideological reasons behind them.

Key words:  Ideology Square, critical discourse analysis, identity construction