NOVELTY - The device comprises a grinder (2), a solid-liquid separator (3), an aerobic fermentation device (4), an anaerobic fermentation device (5), a gas-fire boiler or waste pyrolysis digestion device (6), an anion generator, a pelleting bagging apparatus, a modular sewage disposal system, and an ionized water generator. The grinder is connected with the solid liquid separator by pipeline. The solid-liquid separator is connected with the aerobic fermentation device and the modular sewage disposal system. The aerobic fermentation device is connected with the anaerobic fermentation device.    USE - The device is useful for producing organic fertilizer.    ADVANTAGE - The device is capable of safely producing the organic fertilizer with high efficiency, quality and nutritional value and without toxicity in an environmentally friendly manner thus improving the quality of crops and the physicochemical property of soil.    DETAILED DESCRIPTION - The device comprises a grinder (2), a solid-liquid separator (3), an aerobic fermentation device (4), an anaerobic fermentation device (5), a gas-fire boiler or waste pyrolysis digestion device (6), an anion generator, a pelleting bagging apparatus, a modular sewage disposal system, and an ionized water generator. The grinder is connected with the solid liquid separator by pipeline. The solid-liquid separator is connected with the aerobic fermentation device and the modular sewage disposal system. The aerobic fermentation device is connected with the anaerobic fermentation device. The ionized water generator is connected between the modular sewage disposal system and the aerobic fermentation device. The anaerobic fermentation device is connected with the gas-fire boiler or waste pyrolysis digestion device, the anion generator, and the pelleting bagging apparatus. The gas-fire boiler or waste pyrolysis digestion device is connected with the anion generator by pipeline. An INDEPENDENT CLAIM is included for a method for preparing efficient sustained-release biological organic fertilizer.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a device for producing organic fertilizer.    Grinder (2)    Solid-liquid separator (3)    Aerobic fermentation device (4)    Anaerobic fermentation device (5)    Gas-fire boiler or Waste pyrolysis digestion device. (6)