NOVELTY - Producing histidine fertilizer composition, comprises (i) diluting concentrated sulfuric acid to diluted sulfuric acid, and cooling the solution, reacting the solution with liquid ammonia, and producing ammonium sulfate slurry; (ii) adding ammonium chloride, urea, monoammonium phosphate and potassium chloride, crushing, and mixing; (iii) performing granulating process to produce tail gas, passing by a venturi, washing, and absorbing; and (iv) drying the material, cooling, sieving, measuring, and packaging the finished product.    USE - The method is useful for producing histidine fertilizer composition.    ADVANTAGE - The method prevents the utilization of an adhesive, and consumption of wastewater and tail gas; and is environmental-friendly, where the product quality reaches the national GB-15063 standard inspected by the national legal department.    DETAILED DESCRIPTION - Producing histidine fertilizer composition, comprises (i) diluting concentrated sulfuric acid (98%) to produce diluted sulfuric acid (55-60%), and cooling the solution to 28-30 degrees C, then passing to a granulating machine by a sulfuric acid pipeline of a suspension pipe type reactor with a flow of 40 kg, and reacting the solution with liquid ammonia in the granulating machine, where the liquid ammonia is added by a liquid ammonia pipeline of a pipe type reactor, and producing ammonium sulfate slurry; (ii) adding ammonium chloride (10-15), urea (0-5), monoammonium phosphate (0-10) and potassium chloride (0-10) by 10 times the volume of the column/hour, crushing, and mixing with ammonium sulfate slurry of the step (i) in the granulating machine; (iii) granulating to produce tail gas, then passing the gas by a venturi, washing by adding 0.5-0.6 m3 times the volume of column/hour of diluted sulfuric acid, and absorbing by the venturi; and (iv) drying the material, cooling, sieving, measuring, and packaging the finished product, where the small particle materials are milled and sieved from the large particle materials in the granulating machine. The drying machine inlet gas temperature is 250-300 degrees C, and drying machine outlet gas temperature is 65-85 degrees C, and the cooling machine outlet material temperature is 40-50 degrees C.