The invention discloses a dynamic shale pore pressure transmission tester, which overcomes the defect that physicochemical effects such as properties of drilling fluid and influences of shale permeability and the like on fluid migration are not effectively analyzed currently. In the tester, a core holding unit comprises an upstream workroom and a downstream workroom, a confining pressure automatic tracking pump is connected to the core holding unit through a pipeline, a downstream piston container and a vacuum pump are connected to the downstream workroom of the core holding unit through a shared pipeline, an outlet end of a first upstream piston container and an outlet end of a second upstream piston container are connected with the upstream workroom of the core holding unit through a shared pipeline, and return pressure is provided for an end surface of the core holding unit by a high pressure air source; and the downstream piston container is connected with a mechanical booster bump, and the vacuum pump is connected to a pipeline between the core holding unit and the downstream piston container. According to the device disclosed by the invention, the influence of fluid on the efficiency of shale semi-permeable membranes can be studied.