“The palace of Eternal Youth” is the best libretto of Hong Sheng who is famous in Ging Dynasty. When the libretto was written, allof the performers wanted to show it. And it gained reputation of cheerful “Muu-dan Tyng”. “The palace of Eternal Youth” became very famous in the traditional China drama. The successful element is it's phraseology. About the phraseology of “The palace of Eternal Youth” it doesn"t only have great artistic conception, but also conforms the rules and forms of classical poetic composition. Especially, it is also excellences in meaning and melody. There is a feature in it's phraseology that is good at application to traditional poetry. The most of poetry that he used is about the love story of Li Long-ji and Yang Yu-huan. In the libretto, the phraseology quoting the traditional poetry which including the lyrics of the song, the spoken part of an opera and the poems that the role read when he appear or exit is excellent. This article will discussion about how the writer of “The palace of Eternal Youth” employed the poems of Tang Dynasty to describe the love story about Li Long-ji and Yang Yu-huan in the libretto, and find out it's impotant meanings in the traditional China drama.