| Drama Arts as the signs of opera development, reached its golden age in the Yuan Dynasty. Since the Drama Arts of Yuan dynasty in the history of Chinese literature and art had an important position, Chinese researchers are therefore highly praised and commended drama. China's theater historian----Wang Guo wei, he clearly shows that Chusao, Hanfu, Tangshi and Songci are all art forms that"following generations can't inherit"Opera's literariness was not realized by the human from the very beginning. There is a realized process of Opera's literariness, sometimes it is following the construction of opera text. The opera text construction of Yuan Dynasty implicated that admission to the text by literature.In the admission process the transformation is inevitably. The transformation involves the content and the form aspects. The transformation can not be completed by one time, which has also created the edition content and the formality differently. This article mainly lies in elaborating these differences of formality.This is the article's structure: The first chapter elaborates the reasons that opera text had not been able to complete in the Yuan Dynasty, but completed in the Ming Dynasty. Next describes the anthology system of Yuan opera in the Ming Dynasty before the "Yuan opera to be elected". The second chapter elaborates the background of "Yuan opera to be elected" .Next elaborates the different meanings of"Four acts with the option of a wedge", as well as the origin of this system. The third chapter elaborates the reasons why the"Four acts with the option of a wedge"has been widely accepted. Finally is the conclusion. |