NOVELTY - Fulvic acid is prepared by drying peat, crushing, sieving to 80 mesh, mixing in alkaline extracting solution with weight ratio peat:alkaline extracting solution of 1:10, oscillating uniformly, extracting for 2 hours in boiling water bath, filtering, washing residue with water 2-3 times, combining filtrate and washing liquid, adjusting pH to 0-1 with 2 mol/L sulfuric acid, letting solution stand for 2 hours, filtering, washing with water 2-3 times, combining filtrate and washing liquid, adjusting pH to 6-7 with sodium hydroxide, letting solution stand, and filtering.    USE - Preparation of fulvic acid (claimed).    ADVANTAGE - Preparation of fulvic acid is simple and fast, improves purity of fulvic acid, and reduces production cost.    DETAILED DESCRIPTION - Fulvic acid is prepared by drying peat, crushing, sieving to 80 mesh, mixing in alkaline extracting solution with weight ratio peat:alkaline extracting solution of 1:10, oscillating uniformly, extracting for 2 hours in boiling water bath, filtering, washing residue with water 2-3 times, combining filtrate and washing liquid, adjusting pH to 0-1 with 2 mol/L sulfuric acid, letting solution stand for 2 hours, filtering, washing with water 2-3 times, combining filtrate and washing liquid, adjusting pH to 6-7 with sodium hydroxide, letting solution stand, filtering, washing residue with water 2-3 times, combining filtrate and washing liquid, adding cationic surfactant with weight ratio peat:cationic surfactant of 4:1, mixing uniformly, performing flocculation and sedimentation, letting mixture stand for greater than or equal to 24 hours, filtering, dissolving precipitate in 0.1 M hydrochloric acid (HCl) solution with volume ratio precipitate:HCl of 1:20, adding chloroform extraction liquid with volume ratio chloroform:extract of 1:1, extracting 3 times, collecting aqueous phase to obtain extract, loading glass column with strong acid cation exchange resin, performing conventional activation and pretreatment, passing extract through resin column with space velocity of 0.2-0.3 per hour, washing column with water until effluent is colorless, combining filtrate and washing liquid, evaporating under vacuum with rotary evaporator at 45-60 degrees C until nearly dry, and drying in vacuum dryer.