窥基《妙法莲华经玄赞》共有345条注音,其中反切注音318条,与其所著《法华音训》有同有异。通过对《玄赞》所注反切的特点及注音来源的分析,并将其与《音训》反切进行比较,大致可以断定《玄赞》注音所据韵书是《切韵》。借助相关文献提供的信息,考订出《切韵》风行学林乃至成为定音标准的时间是660-680年之间。 There are a total of 345 phonetic transcriptions, of which 318 are anti-punctuation phonetic transcriptions, which are the same as their “Avalokiteshvara”. By analyzing the characteristics of anti-tanking and the phonetic transcription of “Xuanzan” and comparing it with the anti-tangent of “Yinxun”, we can roughly conclude that the verse of Xuanzan’s phonetic is “Qieyun”. With the information provided by the relevant literature, test out the “cut rhyme” popular school or even become a standard tone time is between 660-680 years.