The translation of the metrical form of drama and opera is a difficult problem in the English translation of Chinese opera classics. Translators should try to make the translation more faithful and aesthetic in the discourse of drama poetry

pursuing the unity of meaning beauty

sound beauty

and form beauty. Yuan Zaju is distinguished from Western dramas by its morphological characteristics. Yuan Zaju has its unique discourse features. The translator should formulate translation strategies and produce different target texts according to different text types and their functions

as well as translation purposes and target readers. For text types like Yuan Zaju

where the expressive function is its main feature

it is reasonable to faithfully present its aesthetic form in translation. Yuan Zaju

as one of the earliest representatives of the mature form of Chinese drama

its excellence is first reflected in its script form. From this perspective

the micro and macro deviations of the translation from the original text in discourse meaning have a greater negative impact on the quality of the translation. Discourse function closely related to text typology is by no means an auxiliary function but an indispensable function in the quality evaluation of opera translations.