Abstract:Kun opera,which has a history of 600 years,is a living fossil in the history of opera,whose delicate musical style makes it unique in the Chinese traditional opera.Besides local humanities,geographical and historical factors,many other factors form the musical styles of Kun opera including instruments concerned.The main accompaniment of Kun opera is Qu flute which has elegant and mellow tone and is close to musical style of Kun opera.When Qu flute accompanies with Kun opera,it fully embodies the advantages of itself.The fusion between Qu flute and Kun opera is good for respective development of artistic vitality.This paper,after illustrating the performance of traditional Qu flute in Kun opera,analyzes the tempered scale,playing skills and the elements of timbre.Furthermore,this paper summarizes the use of Qu flute in the application of Kun opera,which indicates that close cooperation between Kun opera and Qu flute is the best two—way selection in the long-term artistic practice.