This paper aims at exploring stylistic features of Abraham Lincoln’ Gettysburg Address by applying the analysis methods of dualism in stylistics. The analysis is done from the following four respects: lexis, grammar, rhetorical devices and cohesion and context. And we find that Abraham Lincoln’ Gettysburg Address belongs to formal style. Though its structure tends to be complicated, its fog index belongs to easier category; therefore its language is not very hard to understand. Owing to the use of a lot of rhetorical devices, its language is lively and impressive.