《大广益会玉篇》卷末所附《四声五音九弄反纽图》(简称“神珙本”)中的五音图是中古音韵学独特而关键的历史文献。本文以之为研究对象,在总结中日前辈学者研究成果的基础上,分六个章节分别探讨其用途、用语、布图、语音、成书以及五音图与神珙本和唐院本的相关性等问题,深入揭示五音图的性质。本文通过多侧面的分析考证,首先认为五音图是展示双声叠韵原理的反切练音图。而其用语的不平衡表象后面隐含了后世失传了的早期创意,而从五音各图的排列方位违背了《白虎通义》以来五行五方的配伍关系来看,可知图面、文字已非原貌,多有错讹。五音图在用字使用三等字和流音字的语音特征与九弄图一致,但全无后者所具的四声纽观念,因此其成书时代可以上溯到南北朝。五音图作为神珙本的一个独立单元,据考证可以断定是后来编入的,而其最终编成与唐院本等唐末五代所见口舌发音模式表述前后相关。神珙本是在传承唐院本内容的基础上形成的,但文本中的各个构成部分是独自完成并最后被合编成书的。本文对五音图的探讨角度独特,考辨翔实,结论新颖。 The pentagram map of “Four Sounds, Five Sounds and Nine Antispics” (“Shenbian Ben”), attached to the end of the book, is a unique and crucial historical document of ancient phonology. On the basis of summarizing the research results of the scholars of China and Japan, this article divides six chapters into six chapters respectively to discuss their relevance, terms, layout, phonetics, pronunciation, writing, And other issues, in-depth disclosure of the nature of pentameter. This article through multi-lateral analysis of textual research, first of all that the pentotonic figure is the double overlapping rhyme principle anti-cut practice map. However, the unbalanced appearance of terms implies the early ideas lost from the later generations. However, the arrangement orientation of the pentagram maps violates the compatibility relationship between the five elements and the pentagon since the “Baihu Tongyi” The original appearance, many mistakes. The phonetic features of pentasophylla used in three languages ​​and phonetic sounds are the same as those of nine phonetics, but none of them has the concept of “four pronunciations”, so its age can be traced back to Northern and Southern Dynasties. As an independent unit of divine scriptures, it can be concluded that the pentagram map was later compiled, and its final compilation is related to the formulation of the articulation pattern of the tongue of Tang Dynasty and the Five Dynasties. The text was formed on the basis of the content of the Tang dynasty, but the various parts of the text were completed on their own and finally incorporated into the book. This article discusses the pentatonic perspective unique, accurate examination, the conclusion is novel.