NOVELTY - The multi circulative stirring anaerobic fermentation system comprises a fermenting tank (8), and a driving device (1). The fermenting tank: is placed on the driving device, arranged on an exhaust pipe (3) and a pressure control device and connected with a second preprocessing system, a valve shaft, a biogas reflux circulating pump and a biogas slurry refluxing circulating pump valve; has an egg shaped structure; and comprises a umbrella-shaped gas flow distributor (19). A center of an inner cavity of a cylinder is provided with an inner spiral agitator.    USE - Used as a multi circulative stirring anaerobic fermentation system.    ADVANTAGE - The rapid multi circulative stirring anaerobic fermentation system can be economically manufactured with less energy consumption and high fermentation quality and yield.    DETAILED DESCRIPTION - The multi circulative stirring anaerobic fermentation system comprises a fermenting tank (8), and a driving device (1). The fermenting tank: is placed on the driving device, arranged on an exhaust pipe (3) and a pressure control device and connected with a second preprocessing system, a valve shaft, a biogas reflux circulating pump and a biogas slurry refluxing circulating pump valve; has an egg shaped structure; and comprises a umbrella-shaped gas flow distributor (19). A center of an inner cavity of a cylinder is provided with an inner spiral agitator. The agitator is provided with a temperature heating device. A bottom of the tank is provided with an umbrella-shaped airflow distributor inlet pipe (10) and mud sand outlet. A side wall of the tank is connected with a marsh gas circulating system, a heating system, and a temperature controlling system. The marsh gas circulating system comprises a pipeline and a yeast exhaust pipe. The exhaust pipe is connected with a first preprocessing system, a methane preprocess valve, a fourth preprocessing system, and self-circulation biogas stirring pipe net valve. The self-circulation biogas stirring pipe net valve is connected with the umbrella-shaped air flow distributor air inlet pipe and the umbrella-shaped gas flow distributor. The first preprocessing system comprises a negative pressure protection device, desulfurizer and buffer device. The fourth preprocessing system comprises an air compressor, a gas storage cabinet pressure container and a pressure regulating box. Each of the air compressor, the gas storage cabinet pressure container and the pressure regulating box is connected through the gas pipe. The fourth pre-processing system is connected through the marsh gas conveying pipe net valve, a self-circulation biogas stirring pipe net valve, and marsh gas flow rate automatic control valve. The marsh gas flow rate automatic control valve is provided with a steam boiler and the air current distributor inlet pipe. The gas-liquid valve is connected with the marsh gas circulating system. The marsh gas circulating system is connected with the liquid circulating device and by pipeline, and comprises a biogas through pipe line. The first liquid circulation system valve, the second liquid circulation system valve and the third liquid circulation system valve are connected with the fermentation tank. The second pre-processing system comprises a septic tank, an acidification pool, a heating measuring pool, a pump and a valve well. Each of the device in the second pre-processing system is connected with the liquid pipe. The heating system comprises the steam boiler, and connected with municipal heat supply heating device. The heating device is connected by pipe line of heating system water inlet valve, a heating system water outlet valve, and a water circulating system water inlet valve. The water circulating system water inlet valve is connected with the steam boiler and municipal heat supply valve. The steam boiler water inlet pipe is connected with a water pump, the third pre-processing system and steam boiler water inlet valve. The steam boiler pipeline is connected with a marsh gas flow rate automatic control valve. The temperature heating device through raw material pre-processing system is connected with the second preprocessing system. The temperature control system comprises the heating device and a temperature detecting thermoelectric couple. The heating device and the temperature detecting thermoelectric couple are respectively connected with the constant temperature automatic control device. The inner tube form spiral agitator is provided with a hollow shaft, and a baffle plate. A foam device is driven by the hollow shaft. The hollow shaft is provided with a spiral agitator blade. The temperature heating device is formed by mesh shaped heat pipe and day shaped heat pipes combined X shaped structure. The water inlet pipe and the water outlet pipe are staggered X shaped heat along the tank. The adjacent X shaped heating structure has 0.30-0.50 m. The ring layer has 0.50-0.70 m. The umbrella gas flow distributor has a conical opening structure, which are symmetrically distributed along the cone circle of venturi gas-liquid mixer. The tank has an annular structure with a cavity present between the mixer cylinders and a volume of 500-3000 m3. A gas-liquid mixer feeding opening is connected with the umbrella-shaped gas flow distributor. The conical outer side surface of the air-liquid mixer outlet is arranged in the umbrella gas flow distributor. The air inlet pipe is connected and supported on the gas-liquid mixer feeding port and airflow mixer gas outlet of the pipe section. The gas-liquid mixer is connected through a bevel gas flow distributor. A bevel air current distributor inlet pipe is supported in the anticlockwise cone circle inclined direction. The inclined direction is the same as the rotating direction of the hollow shaft. The inclined angle is 3-10 degrees . An inner diameter of the tank with stirrer sleeve diameter is 0.30-0.50.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a multi circulative stirring anaerobic fermentation system.    Driving device (1)    Exhaust pipe (3)    Fermenting tank(10) Airflow distributor inlet pipe (8)    Gas flow distributor. (19)