模糊语言是一种广泛存在于人类语言交际中的语言现象，是语言的基本特征。有时模糊语言可以比精确的表达更准确、更具有说服力，帮助说话者达到交际目的，因此受到了语言学家们的高度重视。文章试图通过具体的例子来分析模糊语言的语用功能特点，探索模糊语言的使用给大学英语教学带来的积极影响。“,”Vagueness is a basic future of language. it is a linguistic phenomenon, which is widely used in people ’ s verbal com- munication. Sometimes it can be more accurate, more persuasive than precise expression, which can help speakers achieve their communicative goals. Therefore, more emphasis is received from linguists. This thesis will illustrate its pragmatic functional fea- tures by some concrete examples and explores the positive effects on college English teaching by using vague language.