词汇是语言的基本组成单位,而一词多义现象在英语学习中非常普遍。本文从认知语言学的原型范畴理论的角度,探讨了原型范畴理论的含义及特点,对一词多义现象进行了讨论,尝试着将原型范畴理论应用于大学英语多义词教学之中。本文认为应该注重原型意义、其他意义之间联系以及转喻和隐喻意义的教学。 Vocabulary is the basic unit of language, while the word polysemy is very common in English learning. This paper explores the meaning and characteristics of prototype category theory from the perspective of prototype category theory of cognitive linguistics. It discusses the concept of polysemy and attempts to apply the prototype category theory to the teaching of college English polysemy. This paper argues that we should pay attention to the prototype meaning, the connection between other meanings and the teaching of metonymy and metaphorical significance.