NOVELTY - Stable molten granulated seaweed fertilizer comprises (in parts by wt.) carbamide (400-600), monoammonium phosphate (100-350), potassium sulfate (80-350), combined urease inhibitor (0.5-5), combined nitration inhibitor (0.5-5), seaweed concentrated extraction solution (1-30) and filler (30-100). The raw material is a commercial product. The nitrogen content in: carbamide is 46.2 wt.%; and monoammonium phosphate is 11.1 wt.%. The phosphorus pentoxide content in monoammonium phosphate is 44 wt.%.    USE - Used as a stable molten granulated seaweed fertilizer.    ADVANTAGE - The fertilizer is natural and ecofriendly, yield is better, and improves crop quality, plant resistance, and reduces energy consumption and saves energy sources.    DETAILED DESCRIPTION - Stable molten granulated seaweed fertilizer comprises (in parts by wt.) carbamide (400-600), monoammonium phosphate (100-350), potassium sulfate (80-350), combination urease inhibitor (0.5-5), combination nitration inhibitor (0.5-5), seaweed concentrated extraction solution (1-30) and filler (30-100). The raw material is a commercial product. The nitrogen content in: carbamide is 46.2 wt.%; and monoammonium phosphate is 11.1 wt.%. The phosphorus pentoxide content in monoammonium phosphate is 44 wt.%. The potassium oxide content in potassium sulfate is 50 wt.%. The filler is talc powder, calcium powder and/or attapulgite. The combined urease inhibitor is formed by combining N-butyl thiophosphoric triamide, hydroquinone and phenyl phosphorodiamidate in a weight ratio of 1:1:1. The combined nitration inhibitor is formed by combining dicyandiamide and 3,5-dimethylpyrazole in a weight ratio of 1:1. The seaweed concentrated extraction solution is prepared by adding (in parts by wt.) seaweed (1) and water (25-35) into a reaction kettle, adding potassium hydroxide (0.1-0.4), heating to 80 degrees C, continuously stirring, insulating for 3 hours, filtering the mixture, vacuum concentrating the filtered liquid for 5 times. An INDEPENDENT CLAIM is also included for preparing the stable molten granulated seaweed fertilizer, comprising: (i) melting carbamide at 130-140 degrees C to form molten carbamide, adding combined urease inhibitor, combined nitration inhibitor and the seaweed concentrated extraction solution, uniformly stirring to pass into a buffering tank, pressing via a conveying pump, and metering and transmitting to a tower top mixing tank; (ii) mixing heated monoammonium phosphate, potassium sulfate and filler with the molten carbamide, uniformly stirring in a stirrer, crushing and screening mixed raw material, heating in a material mixing heater at 85-100 degrees C, and lifting to a tower top material bin via a lifting machine; and (iii) metering the heated mixed material in the tower top material bin via a spiral metering scale and then transmitting to the mixing tank, mixing via a high-speed cutting stirrer to prepare magma material, controlling the temperature at 100-120 degrees C, filtering particle impurity via a shaking filter and then overflowing to a prilling nozzle, spraying the mixture to form ball-shaped small liquid drop equably under the action of the nozzle rotary cutting centrifugal force, introducing into a tower with diameter of 12-20 meters and height of 105-120 meters via the small liquid drop falling and spraying from the nozzle, exchanging heat with rising airflow in the tower and then cooling to 45-65 degrees C to prepare compound particle fertilizer, cooling, screening and performing anti-blocking process, metering and packing.