语域是指语言随着使用场合或环境的不同而区分的功能变体。语域理论是系统功能语言学的一个重要理论。本文首先介绍了语域理论的内容,其次,以实例具体分析了语言运用中语域混淆现象的语用修辞效果。最后,指出语域混淆实际上是语言运用中的变异现象,是作者、交际者超越常规的表达方式,展现了创造性运用语言的魅力。 Register refers to the language with the use of the occasion or the difference between the environment and functional variants. Register theory is an important theory of system functional linguistics. Firstly, the thesis introduces the theory of register theory, and second, analyzes the pragmatic rhetorical effect of domain confusion in language use by examples. Finally, it is pointed out that confusional confusion is actually a phenomenon of variation in the use of language. It is beyond the normal expression of the author and communicator, and demonstrates the charm of using the language creatively.