Primary angle closure glaucoma is the main type of glaucoma in Asia. Plateau iris is one of the important mechanisms of non-pupil block. After years of research, the concept of plateau iris has been gradually clarified, and its epidemiology, pathogenesis, diagnosis and treatment have been gradually recognized. The purpose of this review is to describe the relationship between plateau iris and angle closure glaucoma, and to provide reference for clinical treatment and research of angle closure glaucoma.