Abstract: Dialect belongs to the problem of speaker robustness. Dialect has some phonetic,lexical,grammatical and other features different from Putonghua,and the speaker will have more or less negative transfer of the characteristics of mother tongue when switching to Putonghua,to leave behind the accent analysis region or native clues. In this study,we used Qinzhou dialect and Liuzhou dialect as the carrier to analyze the changes of the dialects in the aspects of hearing,sound change,tone change and frequency spectrum. The results show that in Qinzhou dialect and Liuzhou dialect,the dissonance in tone changes to Yangping,while in Liuzhou dialect,there is a small deviation in the parameters of three vowel formants such as a,e ando ,the formant parameters of the two vowels i and u were partly significantly different in F 3 and F 4.