Based on the background of the development of Chinese new media documentary，this report introduces the development of Youku and its documentary channel，and combines exclusive interviews and authoritative data to comprehensively analyze the development of Youku documentary in 2019. The survey found that in 2019，Youku took the cultural value pursuit and social responsibility as its brand positioning，and built a unique content layout；it relied on Alibaba’s publicity system to effectively build a secondary communication ecosystem，and grasped the trend of younger and feminine users for refined operation；it also treated copyright introduction and self-made documentaries equally，and its new VIP membership promotion strategy and investment system jointly created a virtuous business cycle. In the future，Youku documentary will rely on Alibaba Group to accurately capture users’ demands，continuously improve production mechanism，expand diverse business models，and strive to achieve its ultimate goal.