The invention discloses a peanut special fertilizer additive resistant to plant diseases and insect pests. The peanut special fertilizer additive is prepared from the following raw materials in parts by weight: 20-25 parts of peanut shell, 4-5 parts of clay, 0.3-0.5 part of polypropylene glycol, 1-2 parts of an EM microbial agent, 2-4 parts of banana peel, 3-5 parts of watermelon peel, 3-5 parts of pine needle, 1.5-1.8 parts of soybean pod, 1-1.5 parts of compound sodium nitrophenolate, 2-4 parts of sweet potato seedling, 3-5 parts of plantain, 1.8-2.2 parts of honeysuckle, 1-1.5 parts of stellera chamaejasme, 0.3-0.4 part of malic acid, 1-2 parts of dicyanamide, 1-4 parts of soluble chitosan, 1-2 parts of lecithine, 0.2-0.4 part of fatty acid, and 1-2 parts of sodium doodecyl benzene sulfonate. According to the invention, the clay has greater specific surface area and pore volume, and has special adsorbability and the ion exchange performance, and the clay is applied into soil to cooperate with the malic acid, biochar and the like through the utilization of the properties to achieve the synergistic effect, so that the soil environment is remarkably improved, the soil pollution degree is reduced, and the heavy metal ions are adsorbed.