Science popularization documentary is an important way and means to carry out science popularization work. Taking the science popularization documentary communication under the current media environment as the research object, this paper examines the difficulties and obstacles of science popularization documentary in the subject selection, narrative mode, type and style, and communication platform under the change of media environment, this paper discusses the new trend of attention distribution reform under the influence of new media technology, platform thinking and user participation, and summarizes the communication innovation path of science popularization documentaries under the guidance of topic marketing. Finally, combined with the needs of science popularization work and the current situation of media ecology, the paper puts forward the communication innovation strategy of science popularization documentaries, focusing on vertical fields and striving for circle communication, focus on micro narration and promote topic development, demonstrate the personality of science popularization and build a differentiated market, multimedia will be deployed to form full media communication.

science popularization documentary  /  media environment  /  circle layer propagation  /  micro-narrative  /  attention distribution