NOVELTY - Solar assistant heating-type methane producing device comprises biomass methane fermenting system connected to assistant heating system. The methane fermenting system comprises anaerobic reaction tank; gas storage tank on upper part of anaerobic reaction tank; air outlet arranged on gas storage tank; vent provided at bottom part of gas storage tank for communicating with anaerobic reaction tank provided with feed port, discharging port, feed port valve, and discharging port valve; and feeding pump is between feed port valve and anaerobic reaction tank.    USE - Solar assistant heating-type methane producing device.    ADVANTAGE - The methane producing device allows baffling of material liquid and extending moving route of material liquid in anaerobic reaction tank. It avoids short circuit, dead corner, and incrustation. It guarantees residence time of sludge and improves fermentation efficiency.    DETAILED DESCRIPTION - Solar assistant heating-type methane producing device comprises biomass methane fermenting system connected to assistant heating system. The methane fermenting system comprises anaerobic reaction tank; gas storage tank on upper part of anaerobic reaction tank; air outlet arranged on gas storage tank; vent provided at bottom part of gas storage tank for communicating with anaerobic reaction tank provided with feed port, discharging port, feed port valve, and discharging port valve; and feeding pump is between feed port valve and anaerobic reaction tank. The assistant heating system comprises heat exchanger arranged on bottom part of anaerobic reaction tank; and heat collector. The middle inner side of anaerobic reaction tank is provided with at least one baffle and at least one heat exchanger which divides anaerobic reaction tank into several separation chambers. The methane producing device also includes heat-preserving water tank between heat exchanger and heat collector, which is connected with water level control system and temperature control system. The bottom part of heat-preserving water tank is provided with electric heater and drain valve. The pipeline for connecting heat-preserving water tank and heat exchanger is provided with circulating water pump. Hot water inlet valve is arranged between circulating water pump and heat exchanger. The bottom part of heat exchanger is provided with water return pipe connected with water inlet pipe and water outlet pipe of heat collector. The water inlet, water outlet, and water return pipe of heat collector are provided with water inlet solenoid valve, water outlet solenoid valve, and water return solenoid valve. The water outlet is provided with venting valve. The upper part of heat-preserving water tank is provided with water supplying hole having water supplying valve. The device also includes reflowing pipe between anaerobic reaction tank and discharging port valve. The lower part of baffle is bent at angle of 30-75 degrees . The inner side of anaerobic reaction tank on upper parts of feed port and discharging port is provided with feed port separator and discharging port separator which are inclined downwards at angle of 30-60 degrees . The heat exchanger comprises heat exchange pipes connected via flat plate and porous sieve plate provided with water passing holes. The porous sieve plate divides cavity body of heat exchanger into hot water collecting tank and cold water collecting tank.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of solar assistant heating-type methane producing device.