随着经贸往来的发展,商务信函在商务沟通中的媒介作用日益突显出来,而礼貌是商务信函写作中的重要语言特点。在此,从礼貌原则出发,从礼貌语言、对方本位、委婉语气三个角度阐述礼貌原则在商务英语写作中的具体应用。 With the development of economy and trade, the media role of business letters in business communication has become increasingly prominent, and politeness is an important language feature in business letter writing. Here, starting from the principle of politeness, this paper expounds the specific application of politeness principle in business English writing from three aspects: polite language, counterparty and euphemism.