The utility model discloses an electric field enhancement anaerobic fermentation methane producing device, and belongs to the technical field of biological energy sources. The electric field enhancement anaerobic fermentation methane producing device comprises a direct-current power source, a feed port, a negative electrode plate, a positive electrode plate, an anaerobic fermentation chamber, a water pressure room and a desulfurizer. The anaerobic fermentation chamber is a cylinder, one side of the bottom is connected with the bottom of the feed port through a communicating hole, the negative electrode plate and the positive electrode plate are installed in the anaerobic fermentation chamber, the other side is connected with the bottom of the water pressure room through a communicating hole, the top is connected with the desulfurizer through a methane guide pipe, and desulfurized methane is led to methane users. By the adoption of the electric field enhancement anaerobic fermentation methane producing device, the fermentation efficiency of an anaerobic fermentation system can be greatly improved, and the gas output is improved.