Abstract：Conversational Cooperative Principle is proposed by the American philosopher H. Paul Grice, and has become an important part of linguistics. Business English correspondence is an important means in developing foreign trade and business activities. At the same time, it is also the basic business skill that a business worker must master. Business correspondence writing must observe conversational Cooperative Principle including maxim of quantity, maxim of quality, maxim of relevance and maxim of manner. This thesis studies business correspondence writing from the aspect of Cooperative Principle, exploring it guiding role in it and hoping it has some reference significance for business English correspondence writing.

    The thesis consists of four chapters. Chapter One serves as a brief introduction, including the background of the study, Cooperative Principle, the requirements for business correspondence and the structure of this thesis. Chapter Two presents previous studies in the relevant field. Chapter Three shows the guiding role of Cooperative Principle in Business English Correspondence Writing. Chapter Four is a conclusion in which major findings of the study are summarized, and also shows the limitation of this thesis.

Keywords: Business English Correspondence  Cooperative Principle  Writing

摘要：会话合作原则是由美国哲学家格赖斯提出的，该原则现在已成为语言学中的一个重要内容。商务英语函电是开展对外经济贸易业务和有关商务活动的重要手段，同时也是从事商务工作人员必须具备的基本业务技能。商务函电写作必须要遵守会话合作原则。该原则包括数量原则、质量原则、关联原则和方式原则。本文结合会话原则，从不同的角度分析其对商务函电写作的指导作用，这对商务英语函电的写作具有一定的借鉴意义。

　　　全文共分为四个章节。第一章介绍本文的研究背景，合作原则，商务英语函电以及本文结构。第二章主要是写前人对合作原则的研究和前人对商务函电写作的研究。第三章研究合作原则在商务英语函电中的应用。第四章是结尾部分，该部分总结全文，并指出本文的不足和需要改进之处。

关键词: 商务英语函电；合作原则；写作