礼貌体现了人类文明,存在于各种语言和文化中,在人们的交流中扮演着十分重要的角色。它帮助维持和巩固和谐的人际关系,促进和谐的社会交际。礼貌原则也是语用学领域重要的理论之一,并且引起了很多英语教学专家和老师的关注。本文阐述了礼貌原则的定义及其相关理论,并且给出教学案例阐述如何将其运用到具体的中学英语课堂教学中。 Politeness embodies human civilization, exists in various languages ​​and cultures, and plays a very important role in people’s exchange. It helps to maintain and consolidate harmonious interpersonal relationships and promote harmonious social communication. Politeness principle is also one of the important theories in the field of pragmatics, and has aroused the concern of many English teaching experts and teachers. This article elaborates the definition of politeness principle and its related theory, and gives the teaching case to explain how to apply it to the specific English teaching in middle school.