In primitive society, people sang and danced, but did not write poems, because there was no text at that time. Similarly, people in prehistoric times also performed plays, and most of the Chinese drama actors were illiterate after the words were written. However, for a long time, people have fallen into the trap of writing and literature worship, and even the textual research has always become the history of literature, the most highly regarded research method in the history of drama, and the most effective approach to historical reality. If there is "new material" in the field of theater history research, it must be more than just literature. This text mainly emphasizes:. ['The study of the history of drama needs to update ideas and innovate research methods.', 'The study of drama history must be connected with traditional research and break through the limitations.', 'Research on drama history requires both literature and research.', 'Research on drama history should expand research fields and methods.']