NOVELTY - Forming slow-release sulfur coated urea fertilizer involves taking large urea granules having particle diameter of 3-4 mm and passing through metered electronic belt into coating machine to form coating material; entering material into preheater and passing a flow of hot air at 100 degrees C for heat exchange; preheating urea; spraying molten sulfur at 150 degrees C and at pressure of 0.35 MPa and passing through multiple sets of nozzles to form sulfur coated capsule; heating capsule at 145 degrees C to 155 degrees C with melted paraffin; subjecting to second coating treatment; and spraying at pressure of 0.35 MPa.    USE - For the production of slow-release sulfur coated urea fertilizer (claimed).    ADVANTAGE - The method uses low cost film material, reduces production cost, provides fertilizer with good sustained and controlled release effect, and solves the problem of traditional slow-release fertilizer. The method increases yield of fertilizer, makes complete use of available resources, does not cause environmental pollution, improves utilization rate of fertilizer, allows sustainable development of efficient agricultural products, and provides comprehensive benefit and economic benefits to farmers. The sulfur coating material allows controlled release of nutrients, increases fertilizer utilization rate, forms no residue in soil, and increases yield.    DETAILED DESCRIPTION - Production of slow-release sulfur coated urea fertilizer involves taking large urea granules having particle diameter of 3-4 mm and passing through metered electronic belt into coating machine, where machine inlet temperature is 95 degrees C and outlet temperature is 45 degrees C to 55 degrees C to form coating material, where the flow speed of the material is 5 m/seconds and flow rate is 1-10 t/hours; entering the coating material into a preheater and passing a flow of hot air at a temperature of 100 degrees C for heat exchange; preheating the urea, where preheating temperature is 85 degrees C; spraying molten sulfur at a temperature of 150 degrees C and at a pressure of 0.35 MPa and passing through multiple sets of nozzles to form sulfur coated capsule, where coating film thickness is 0-0.5 mm and spraying pressure is 0.35 MPa; heating the sulfur coated capsule at 145 degrees C to 155 degrees C with melted paraffin; subjecting to second coating treatment to form secondary coating having thickness of 0.002 mm; spraying at a pressure of 0.35 MPa; weighing the finished product and packaging.