NOVELTY - Fertilizer comprises kaolin, chitin, tobacco, Chinese chestnut powder, potassium dihydrogen phosphate, attapulgite clay, modified rock phosphate powder, iron waste residue, and suitable quantity of water, where the modified rock phosphate powder comprises rock phosphate powder, gamma -poly glutamic acid powder, ferrous sulfate, calcium bicarbonate, Bacillus subtilis, silicate inoculants, EDTA chelated copper, humic acid, black liquor, and corn starch.    USE - The fertilizer is useful for improving peanut (claimed).    ADVANTAGE - The fertilizer exhibits synergistic effect, improves organic matter content in soil, absorbs ion, increases soil fertility, increases trace element, and yield of peanut and is highly stable.    DETAILED DESCRIPTION - Fertilizer comprises 41-45 pts. wt. kaolin, 6-8 pts. wt. chitin, 14-18 pts. wt. tobacco, 13-17 pts. wt. Chinese chestnut powder, 4-7 pts. wt. potassium dihydrogen phosphate, 3-4 pts. wt. attapulgite clay, 60-80 pts. wt. modified rock phosphate powder, 5-6 pts. wt. iron waste residue, and suitable quantity of water, where the modified rock phosphate powder comprises 90-110 pts. wt. rock phosphate powder, 1-2 pts. wt. gamma -poly glutamic acid powder, 4-8 pts. wt. ferrous sulfate, 6-9 pts. wt. calcium bicarbonate, 2-3 pts. wt. Bacillus subtilis, 3-4 pts. wt. silicate inoculants, 18-22 pts. wt. EDTA chelated copper, 24-26 pts. wt. humic acid, 13-17 pts. wt. black liquor, and 35-45 pts. wt. corn starch. The modified rock phosphate powder is prepared by heating and evaporating black liquor, adding rock phosphate powder, concentrating into solid, baking the mixture at below 400-500 degrees C, adding gamma -poly glutamic acid powder, EDTA chelated copper, humic acid, and corn starch to baked product, grinding and sieving the mixture through 150 mesh size sieve to obtain mixed powder, adding suitable quantity of water, uniformly stirring mixed powder, adding ferrous sulfate, mixing, heating the mixed powder at 40-60 degrees C, chelating mixed powder for 20 minutes, stirring, adding calcium bicarbonate, uniformly stirring, heating and chelating the mixture at 60-70 degrees C for 30 minutes, stirring uniformly, cooling the hot mixture at room temperature, adding B.subtilis and silicate inoculants, culturing at below 20-30 degrees C for 7-8 days, naturally drying and grinding into fine powder, and sieving through 100-120 mesh size sieve to obtain modified phosphate. An INDEPENDENT CLAIM is included for method for preparing fertilizer, which involves (a) sintering kaolin at 650-850 degrees C for 3-5 hours, cooling and grinding sintered kaolin into fine powder, and sieving fine powder through 100 mesh size sieve, (b) adding iron waste residue, tobacco, and Chinese chestnut powder to the fermentation tank, adding suitable quantity of water, fermenting the heap at 40-50 degrees C for 3-4 weeks, and drying and grinding the fermented powder into fine powder, (3) uniformly mixing kaolin fine powder obtained in step (a), and fermented powder obtained in step (b), adding attapulgite clay, and uniformly stirring to absorb fermentation powder, and (d) adding modified rock phosphate powder, and the remaining materials to the fermentation powder obtained in step (c), grinding and sieving the mixture through 90-100 mesh size sieve, weighing mixed powder, and packing the product.