《玄應音義》是唐初語音研究的重要文獻資料。在周法高先生研究的基礎上,運用並注多音對立考察法、切語用字分析法、系聯法、反切比較法四個方面證明玄應語音中從、邪分立不混,並對混注例作了逐一分析,認爲這些混注例有可能是運用反切比較進行研究時所據參照系《廣韻》中切語與“援引群籍”時承襲自《玉篇》等書切語歸屬不同類別的原因造成的。 “Xuan Ying sound and meaning” is the important literature data of phonetics research in early Tang Dynasty. On the basis of the research of Mr. Zhou Fagao, this paper proves that there are four aspects in Xuanying’s speech, such as the method of phonetic polyphonic opposition examination, the word-for-word analysis, the conjunction method and the anti-tangency comparison method, Made one by one analysis, that these mixed examples may be the use of anti-cut comparative study according to the reference system “Guangyun” in the cut and “quoted the group ” inherited from the “Jade articles” and other books attribution Different types of causes.