Abstract:  Interpersonal meta-function is one of the three meta-functions in systemic functional linguistics.Based on Halliday’s functional grammar,this paper deals with the interpersonal meta-function of Churchill’s broadcasting Speech on Hitler’s Invasion of the U.S.S.R from three aspects,i.e.mood,person and modality.It analyzes the different forms of interpersonal meanings of this speech to show how the author achieves the aim of the speech.The analysis here will illustrate that a functional linguistic analysis will help the reader to better understand the text and that this kind of exercise will help develop students’ sensibility to language.

Key words: systemic functional linguistics, interpersonal meta-function, political speech