Emily Dickinson,one of the most celebrated American poets,writes nearly 1800 poems during her lifetime.Her poetry,a flower rooted in Puritanism,expresses the poetess’s love for life,mediation on nature and religion,and longing for beauty and truth.Along with Walt Whitman,Dickinson is regarded as the pioneer of American modernistic poetry.However,studies on such a great poet are mainly from the perspective of literary criticism,and few of them are from the linguistic approach.This thesis will give a detailed analysis of one of her poems in the perspective of deviation,so as to reveal her unique stylistic features. Emily Dickinson, one of the most celebrated American poets, writes nearly 1800 poems during her lifetime. Her poetry, a flower rooted in Puritanism, expresses the poetess’s love for life, mediation on nature and religion, and longing for beauty and truth. Along with Walt Whitman, Dickinson is regarded as the pioneer of American modernistic poetry. Yet, studies on such a great poet are mainly from the perspective of literary criticism, and few of them are from the linguistic approach. This thesis gives a detailed analysis of one of her poems in the perspective of deviation, so as to reveal her unique stylistic features.