Thermal conductive plastic and preparation method thereof

The invention discloses a thermal conductive plastic and a preparation method thereof. The thermal conductive plastic is composed of the following raw materials in percentage by weight: 40-80% of a thermoplastic resin, 5-30% of a glass fiber, 1-10% of a flexibilizer, 1-10% of a flame retardant, 1-15% of a thermal conductive additive, 1-10% of a lubricant, 1-10% of a dispersant and 0.1-0.5% of an antioxidant. The preparation method of the thermal conductive plastic comprises the following steps: after the thermoplastic resin, the flexibilizer, the flame retardant, the thermal conductive additive, the lubricant, the dispersant and the antioxidant are uniformly mixed, adding the obtained mixture from a first cylinder body of a twin-screw extruder, and adding the glass fiber from a fourth cylinder body; carrying out extruded granulating under the condition that the rotating speed is controlled at 800-1200 r/min, and baking obtained granules for 4-5 hours under the condition that the temperature of the obtained granules is controlled at 110 DEG C; and carrying out injection molding, so that the thermal conductive plastic is obtained. The thermal conductive plastic is good in flame retardancy and high in thermal conductive efficiency, and has good mechanical properties.