NOVELTY - Fertilizer additive comprises 20-25 pts. wt. dead leaves, 5-8 pts. wt. diatomite 1-2 pts. wt. dicyandiamide, 1-4 pts. wt. soluble chitosan, 5-7 pts. wt. oligosaccharide, 1-2 pts. wt. dry yeast, 2-3 pts. wt. tea slag, 1-3 polypropylene alcohol, 3-5 pts. wt. Cycocel (RTM: Plant growth regulator), 1-1.5 pts. wt. Japanese artemisia rupestris, 2-4 pts. wt. tung leaves, 1-2 pts. wt. wormwood, 0.4-0.5 pts. wt. fatty acid, 2-3 pts. wt. mannitol, 2-5 pts. wt. ammonium molybdate and 1-2 pts. wt. sodium dodecyl benzene sulfonate.    USE - The fertilizer additive is useful for improving soil environment of peanut (claimed).    ADVANTAGE - The fertilizer additive is rich in nutrients, facilitates rapid absorption of traditional Chinese medicine, and plant growth; has sustained-release effect, long-term effect, and water-retaining effect.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing fertilizer additive, comprising (i) collecting dead leaves, drying so that the moisture content is below 20%, carrying out pyrolysis carbonization at 400-500 degrees C, cooling down, grinding, and passing over 1 mm sieve, to obtain particle diameter of not less than 1 mm biomass charcoal; (ii) sieving charcoal, mixing with diatomite, and stirring while mixing, washing with water to remove surface dust and impurities, mixing the resultant mixture with 5-8% hydrochloric acid solution in a mass ratio of 1:1.5-2.5, soaking for 15-18 hours at room temperature, soaking liquid, and carrying out solid-liquid separation, drying, subjecting the resulting mixed powder to UV radiation for 10-12 hours, modified material was mixed; collecting leaves, drying in the sun to make water content less than 20%, again by hot cracking carbonization at 400-500 degrees C, cooling, grinding, passing through 1 mm sieve, to obtain biomass coal having particle diameter of less than 1 mm; (iii) dissolving sodium dodecyl benzene sulfonate in water, spraying the resulting solution on mixed modified material, and carrying out air-drying, to obtain modified mixed powder; (iv) mixing Japanese artemisia rupestris, tung leaves and wormwood, decocting, taking out residue, filtering dregs and medicine, mixing soluble chitosan with water, adding medicine and fatty acids into the filtrate, stirring at a speed of 100-200 rotations/minute for 10-20 minutes, to obtain composite insecticide solution; and (v) mixing dregs with oligosaccharides, dry yeast and tea leaves, adding mannitol, carrying out outdoor composting for 1-2 days, drying, carrying out modification of mixed powder, and mixing composite insecticide solution with the remaining raw materials, to obtain the final product.