The documentary Maters in the Forbidden City tells the story of how the artisans of the past 600 years have repaired and maintained the Forbidden City to make it permanent and handed down from generation to generation. As a key documentary in 2020，Maters in the Forbidden City was deeply loved by the audience. Through the investigation of the documantary’s creation process，production concept，theme innovation，and dissemination effect，we can find that the younger generation of the production team，the new changes in the aesthetic tastes of the audience，the communication paradigm of new media and the communication strategy of “multi-dimensional communication matrix” have put forward new requirements and challenges for the filming of traditional cultural documentaries.