大学阶段是一个人英语水平迅速提高的阶段,在这个阶段学好语法知识至关重要。语域理论是英语系统功能语法中的一种关键性理论,有利于大学英语的学习,因此为了培养出符合我国今后社会经济、文化稳步提高需要的人才,大学教师应积极地将语域理论应用到大学英语的教学实践中,为学生创设出更有效的英语教学课堂。 University stage is a stage of rapid improvement of English, it is important to learn grammar knowledge at this stage. Register theory is a key theory in functional grammar of English system, which is conducive to the study of college English. Therefore, in order to cultivate talents who meet the needs of social economy and culture in our country steadily, university teachers should actively apply Register Theory To college English teaching practice, for students to create a more effective English teaching class.