NOVELTY - A special fertilizer for cotton base is prepared by raw materials e.g. cottonseed (10-20 parts), coated ammonium hydrocarbonate (15-17 parts), calcium superphosphate (4-6 parts), coated potassium chloride (16-18 parts), fly ash (20-30 parts), manganese chloride (1-2 parts), zinc sulfate (0.1-0.5 parts), borax (0.1-0.3 parts), medical stone (10-12 parts), weathered coal (5-7 parts), Buddleia (3-4 parts), Radix stemonae (3-4 parts), bagasse (10-15 parts), volcanic rock (10-15 parts), lees (18-22 parts), carboxymethyl cellulose (3-4 parts), sulfuric acid (30%, 15-20 parts).    USE - For preparation of special fertilizer for cotton base (claimed).    ADVANTAGE - The fertilizer prepared by the method can improve the fertilizer utilization rate, slows release effect, reduces the fertilizing amount and reduces the pesticide residue. It improves the yield and quality of the cotton.    DETAILED DESCRIPTION - A special fertilizer for cotton base is prepared by raw materials (parts by weight): cottonseed (10-20 parts), coated ammonium hydrocarbonate (15-17 parts), calcium superphosphate (4-6 parts), coated potassium chloride (16-18 parts), fly ash (20-30 parts), manganese chloride (1-2 parts), zinc sulfate (0.1-0.5 parts), borax (0.1-0.3 parts), medical stone (10-12 parts), weathered coal (5-7 parts), Buddleia (3-4 parts), Radix stemonae (3-4 parts), bagasse (10-15 parts), volcanic rock (10-15 parts), lees (18-22 parts), carboxymethyl cellulose (3-4 parts), 30% of sulfuric acid (15-20 parts), proper amount of lime, animal hair (10-15 parts), and wintergreen oil (4-6 parts). The method for preparation of fertilizer involves: 1) adding animal hair into 30% sulfuric acid, hydrolyzing at 100-110 degrees C for 1-2 hours, generating amino acids, adding lime to neutralize the pH value to 6.0-6.8, then adding carboxymethyl cellulose, at last adding manganese chloride, zinc sulfate and borax, dissolving, taking reaction at 90-105 degrees C for 5-6 hours, generating amino acid chelate as fertilizer solution, 2) sintering the rock for 6-8 hours at 400-500 degrees C, adding wintergreen (1-2%), grinding into a powder, and then mixing with fly ash as fertilizer carrier, 3) forming high temperature composting fermentation into organic fertilizer, taking cotton seed cake cypress, bagasse, add proper Bacillus subtilis, after mixing evenly, piling and fermenting, 5-10 days turning stack a sequence, the fermentation temperature is 60-65 degrees C, and the fermentation time is 30-40 days, lots of white hypha in the stack to obtain completely fermented organic fertilizer, 4) coating, and mixing the ammonium hydrogen carbonate, calcium superphosphate, and potassium chloride and crushed with the medical stone, mixing with weathered coal, and fermented organic fertilizer, and smashing, passing by 100-200 items sieve, 5) mixing biological pesticide patrinia powder and Radix stemonae powder, 6) spraying the amino acid chelate solution, fully stirring after granulating, finally spraying holly oil to coat film to obtain cotton base special fertilizer.