江有诰《谐声表》之反切,鲜有学者论及。笔者通过考察《谐声表》反切的内容、体例、来源、古音学思想等,揭櫫江氏对上古音值的认识。认为江氏音切以参考《说文》徐铉切语为主,并结合江氏古音体系为之折合,折合的准则是“古本音”、“转音”理论。江氏所指部分“今音”为歙县方音。某些音切不合江氏古音体系,为江氏“自乱其例”之失误。 There are few scholars who talk about the anti-cut of “Harmonic Table” of Jiang. By examining the contents, methods, sources and ancient phonetics of the anti-cut of the “Harmonic Table”, the author reveals Jiang’s understanding of the ancient sound value. It is concluded that Jiang’s tangential cut is mainly based on Xu Xuan’s cut-off of “Shuo Wen” and the combination of Jiang’s ancient sound system. The equivalent criterion is “ancient tone” and “transfer tone” theory. Jiang refers to part of the “sound” for Pixian dialect. Some sound cuts do not fit Jiang’s ancient sound system, Jiang’s “disorder”.