The invention relates to the technical field of functional elastomer materials, and provides a preparation method and a product of a heat-conductive thermoplastic vulcanized rubber elastomer material,the preparation method comprises: (1) using a coupling agent for surface modification and drying of a heat conductive filler; (2) mixing the modified heat conductive filler with matrix resin for meltblending, extruding, granulating and drying to obtain a heat-conductive resin pellet; (3) mixing the heat-conductive resin pellet with rubber and a vulcanization system to carry out dynamic vulcanization reaction, and squeezing and granulating to obtain the heat-conductive thermoplastic vulcanized rubber elastomer material. The heat-conductive thermoplastic vulcanized rubber elastomer material prepared by the method has the advantages of a small amount of the heat conductive filler, excellent thermal conductivity, excellent processing and forming property, simple production process, high production efficiency and recyclability, and the like and can be widely applied in electronic electrician, automotive and many other fields, so that the heat-conductive thermoplastic vulcanized rubber elastomer material has broad market application prospects.