Animal popular science short video has the characteristics of concise, limited information and weak narrative. In the era of excessive entertainment, animal popular science video is expected to spread scientific influence on the short video platform. In the process of editing from a long video to a short video, instantly meet the cognitive needs of the audience and transfer structured knowledge to them. In order to explore a systematic way of converting long videos of popular science into short videos, this paper refers to the dual-route mode and multimedia screen linguistics . The visual and audio channel in the short videos carry the content of knowledge. After the illustrations, images, subtitles and titles, as well as the design of the video commentary and soundtrack with concentrated emotions, three control experiments were carried out. This systematic method of changing from long to short can provide a reference for the creation of short popular science videos. In the context of fragmentation and excessive entertainment, animal popular science has adapt the videos' design to meet the audience's reading habits. However the animal popular science video must adhere to the authenticity and accuracy of knowledge.