The invention relates to a rubber high-temperature hardness dynamic measurement device capable of dynamically measuring the hardness of rubber at different temperatures, in order to solve the problem that how to evaluate the temperature change of a rubber part under the actual working condition and leads to the change of the surface hardness of the rubber part. The rubber high-temperature hardness dynamic measurement device comprises a temperature control cabinet, a shore durometer, a heating plate, a heating plate fixing frame, a rubber sample placing plate, a durometer support and other parts. The temperature regulation of the temperature control cabinet ranges from room temperature to -300 DEG C; a through hole is formed in the middle part of the durometer support, and is internally provided with the shore durometer, and the through hole and the shore durometer are in clearance fit so as to achieve the axial moving of the shore durometer; the height of the durometer support can be regulated according to the thickness of the rubber sample. In order to ensure that the measurement result is stable and accurate, manual influences are excluded, and the moving distance downward of the durometer is equal to the height of an ejector pin. According to the invention, high-temperature hardness of different rubber formula materials can be tested.