The present application relates to a dynamic expression generation method, a dynamic expression generation device, a computer readable storage medium and a computer device. The method includes the following steps that: entering an expression input panel in a session page; detecting a video capture event triggered in the expression input panel; responding to the video capture event, and collectingvideo data; obtaining editing operation for the video data; processing each video frame in the video data according to the editing operation and then synthesizing the processed video data into a dynamic expression; and adding an expression thumbnail corresponding to the dynamic expression to the expression input panel. According to the method, when a selection event for the expression thumbnail isdetected in the expression input panel, the dynamic expression is displayed as a session message in the session page. With the dynamic expression generation method, the dynamic expression generationdevice, the computer readable storage medium and the computer device provided by the technical schemes of the invention, the efficiency of the generation of dynamic expressions can be greatly improved.