音韵是对汉语历时语音的研究,等韵图是古代的声、韵、调配合表,以图表的形式表示古代汉语的语音系统。本文试图从音系的结构单位和区别特征这两个方面探究音系理论在等韵图中的反映。 Phonology is the study of Chinese diachronic phonology. Equal rhyme diagrams are the ancient sound, rhyme, and tune-up forms, which represent the phonetic system of ancient Chinese graphically. This paper attempts to explore the phonological theory’s reflection in isochronous rhyme from two aspects of phonological unit of structure and distinguishing features.