NOVELTY - A continuous solar biogas generator comprises a tank body and an insulating layer; where the upper part of the tank body is set with a feeding port; the middle part is set with a discharging port and a biogas outlet; the tank body comprises an internal tank and an external tank with sealing cover, and an insulating layer between the internal tank and the external tank; a circulation water tank is arranged between the outer wall of the internal tank and the insulating layer; and the circulation water tank is in communication with a solar vacuum heating collecting pipe and a water storage tank.    USE - The continuous solar biogas generator is useful for continuously producing biogas, cooking, warming, and lighting.    ADVANTAGE - In utilizing the continuous solar biogas generator, a large amount of heat absorbed by the solar vacuum heat collecting pipe rapidly increases temperature of the biogas material through water circulation to achieve the temperature conditions needed by gas production. Moreover, the gas production is fast; the gas yield is high; and the energy of dung can be completely released and converted into biogas. Additionally, the foreign matters discharge port can discharge foreign matters comprising stone and sludge.    DETAILED DESCRIPTION - A continuous solar biogas generator comprises a tank body and an insulating layer; where the upper part of the tank body is set with a feeding port; the middle part is set with a discharging port and a biogas outlet; the tank body comprises an internal tank and an external tank with sealing cover, and an insulating layer between the internal tank and the external tank; the internal tank is set with coiled heat radiating pipeline; a circulation water tank is arranged between the outer wall of the internal tank and the insulating layer; the circulation water tank is in communication with a solar vacuum heating collecting pipe and a water storage tank through a water inlet and a water outlet arranged on the tank body; and the two ends of the heat radiating pipeline are connected to the circulated water tank.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the continuous solar biogas generator.