本文通过对史炤反切与《广韵》、胡三省音切异同的比较研究，讨论了宋代四川方言语音演变的四个方面：浊上变去、浊音清化、平上作去、韵尾混并。这些音变现象反映了宋代四川方音在历时演变过程中的一些特征，从中可以看到宋代四川方言语音的演变与共同语语音的发展基本上是同步的，但同时也具有自己独特之处。 This article discusses four aspects of the phonetic evolution of Sichuan dialect in the Song Dynasty by comparing it with that of the Guangyun and Hu provinces, . These phonetic changes reflect some characteristics of the evolution of Sichuan dialects in the diachronic period in Song Dynasty. From this we can see that the evolution of the phonetic sounds of the Sichuan dialect in the Song Dynasty is basically synchronous with that of the common speech, but it also has its own unique characteristics.