Abstract: About the discrimination between the documentary and the special piece, the argument between the academia and the field is longstanding. This article embarked from the thory of integrationdisintegration and advanced the basic question to the limit: Is the special piece a documentary? The answers given by the history literature, the practice operation and the academic papers had been discussed. The viewpoint was subsequently proposed that the integration theory was representing an academic way while the disintegration theory was representing the practice way. Depending on this foundation, this article inclined to uphold the integration theory, that is to admit the special piece is a documentary.