High-thermal-conductivity potting silica gel and preparation method thereof

The invention relates to the technical field of potting silica gel, and particularly discloses high-thermal-conductivity potting silica gel and a preparation method thereof. The high-thermal-conductivity potting silica gel comprises a component A and a component B, the component A comprises vinyl silicone oil, vinyl modified silicon carbide microspheres, modified MQ resin, hydrogen-containing silicone oil and an inhibitor; the component B comprises vinyl silicone oil, vinyl modified silicon carbide microspheres, modified MQ resin and a platinum catalyst; a preparation method of the modified MQ resin comprises the following steps: S1, taking maleic anhydride and tetra (4-aminobiphenyl) ethylene to prepare an intermediate A; s2, uniformly stirring the intermediate A, low-viscosity vinyl silicone oil, vinyl modified flaky boron nitride and xylene, adding benzoyl peroxide, carrying out a stirring reaction, and removing a solvent to obtain a modifier; and S3, taking the hydrogen-containing MQ resin, a modifier and