The invention discloses a preparation method for a carbon nanotube grounding body. The method includes the following steps: 1) performing electrostatic self-adsorption on carbon nanotubes and ceramicparticles; 2) performing ball milling mixing on composite ceramic particles and silicone rubber to uniformly disperse the ceramic particles covered with the carbon nanotubes into the silicone rubber;3) fully impregnating glass fibers with the composite silicone rubber; and 4) performing pultrusion curing forming on the glass fibers impregnated with the silicone rubber through a heating mold underthe action of traction to obtain the carbon nanotube grounding body. The method uses the electrostatic adsorption of the carbon nanotubes with excellent electrical conductivity and the ceramic particles and uses the silicone rubber and the glass fibers as substrate materials, so that the electrical conductivity, wear resistance and mechanical strength of the final composite material are good; thepreparation method provided by the invention solves the problem of dispersion of the carbon nanotubes in the silicone rubber, and simultaneously increases the abrasion resistance of the silicone rubber; and equipment required for the preparation method has lower costs, the method is convenient to operate, has a shorter preparation period, and is suitable for industrialized mass production.