NOVELTY - Fertilizer synergist comprises modified phosphate rock (60-80 pts. wt.), potassium humate (3-5 pts. wt.), bentonite (39-43 pts. wt.), medical stone powder (6-9 pts. wt.), sodium selenite (3-5 pts. wt.), traditional Chinese medicine residue (22-25 pts. wt.), fish bone meal (18-20 pts. wt.), attapulgite (3-4 pts. wt.), and water. Modified phosphate rock comprises rock phosphate powder (90-110 pts. wt.), gamma-polyglutamate powder (1-2 pts. wt.), ferrous sulfate (4-8 pts. wt.), calcium bicarbonate (6-9 pts. wt.), Bacillus subtilis (2-3 pts. wt.), and silicate bacteria (3-4 pts. wt.).    USE - Fertilizer synergist used for improving yield of peanuts (claimed).    ADVANTAGE - The fertilizer synergist improves cation exchange, complexation and adsorption capacity, and absorption rate and efficiency of fertilizer, and ensures increased income.    DETAILED DESCRIPTION - Fertilizer synergist comprises modified phosphate rock (60-80 pts. wt.), potassium humate (3-5 pts. wt.), bentonite (39-43 pts. wt.), medical stone powder (6-9 pts. wt.), sodium selenite (3-5 pts. wt.), traditional Chinese medicine residue (22-25 pts. wt.), fish bone meal (18-20 pts. wt.), attapulgite (3-4 pts. wt.), and water. Modified phosphate rock comprises rock phosphate powder (90-110 pts. wt.), gamma-polyglutamate powder (1-2 pts. wt.), ferrous sulfate (4-8 pts. wt.), calcium bicarbonate (6-9 pts. wt.), Bacillus subtilis (2-3 pts. wt.), silicate bacteria (3-4 pts. wt.), EDTA-chelated copper (18-22 pts. wt.), manganese humate (24-26 pts. wt.), black liquor (13-17 pts. wt.), and corn starch (35-45 pts. wt.). Modified phosphate rock is prepared by heating black liquor to facilitate its concentration, and then adding phosphate rock. Obtained mixture is calcined at 400-500 degrees C, and then mixed with gamma-polyglutamate powder, EDTA-chelated copper, manganese humate, and corn starch. Obtained mixture is sieved by 150 mesh sieve, and then mixed with water and ferrous sulfate at 40-60 degrees C. Calcium bicarbonate is added to obtained mixture, and then heated at 60-70 degrees C under stirring condition for 30 minutes. Obtained mixture is cooled. Bacillus subtilis and silicate bacteria are added to cooled product, and kept at 20-30 degrees C for 7-8 days. Obtained mixture is air-dried and pulverized by 100-120 mesh sieve to obtain fine powder. An INDEPENDENT CLAIM is included for a method for preparing fertilizer synergist, which involves:    (A) calcining bentonite at 690-730 degrees C for 2-3 hours;    (B) pulverizing calcined bentonite by 100 mesh sieve;    (C) fermenting potassium humate, traditional Chinese medicine residue, fish bone meal and water in fermentation tank at 30-40 degrees C for 3-4 weeks;    (D) pulverizing fermented product to obtain fine powder;    (E) mixing fine powder, attapulgite and bentonite powder;    (F) adding remaining ingredients to obtained mixture; and    (G) pulverizing obtained mixture by 80-100 mesh sieve to obtain the final product.