Abstract:With the development of international business, all kinds of foreign contracts, agreements and informs have come into being. Business correspondence plays an irreplaceable role in trading. Business correspondence, as a mean of communication in the trade field, can not be ignored. It is a link between the buyer and the seller for establishing business connection and exchange of economic information. An excellent business correspondence not only makes favorable impression on suppliers and clients, but also does well to business activities to carry through between two parties. Since China entered into the WTO, many foreign enterprises seek development opportunity in China, and this also gives a chance to China for walking towards the world. China needs the world, the world needs China. This thesis intends to introduce the definition and the functions of business correspondence, analysis the language features and the writing principles. According to what I have learned about this subject, the following is how to discuss the writing method and procedure, writing conception of business correspondence.

Key words: business correspondence; writing principles; language function

中文摘要:随着国际商业的发展，各种各样的外国合同，协议和通知应运而生，商务函电在其中发挥了不可替代的作用。商务函电在贸易领域中作为一种沟通联系的手段，其职能不能被忽视。商务函电在买方和卖方之间起到联系的作用,双方以此为基础,建立业务联系,交流经济信息。良好的商业信函不仅使供应商和客户对企业有好感,而且它有利于双方商业活动的开展。自从中国加入WTO后，许多外国企业申请在中国寻找机遇，以求发展，这也使得中国有机会走向世界。中国企业也会用商务函电与外国企业维持友好合作的关系。中国需要世界,世界需要中国。本选题旨在介绍商务函电的定义和职能，分析其语言功能和写作原则,结合所学的学科中的知识, 浅谈商务函电的写作方法、步骤,写作原理技巧。

关键词：商务函电；写作原理；语言功能