Preparation method of conductive silicone rubber composite material

The invention relates to a preparation method of a conductive silicone rubber composite material, which comprises the following steps: uniformly mixing a conductive filler and n-heptane to obtain a mixture A, uniformly mixing liquid silicone rubber and n-heptane to obtain a mixture B, uniformly mixing the mixture A and the mixture B according to a required ratio, and carrying out extrusion molding to obtain the conductive silicone rubber composite material. The mass ratio of the mixture A to the mixture B is 1: (1-1.5), then sequentially carrying out vacuumizing treatment, pouring and standing until the n-heptane is completely volatilized, and curing to obtain the conductive silicone rubber composite material, and in the conductive silicone rubber composite material, the content of graphene is 4.5-5.5 wt%, the content of carbon nanotubes is 1-1.25 wt%, and the content of carbon fibers is 6-7.5 wt%. The conductive silicone rubber composite material prepared by the method has high conductivity and high tensile