NOVELTY - A pulping device for biogas liquid pump comprises an electric pump and a pump pedestal shell connected by a fixed bolt, where the output shaft of the electric pump is connected to a prolonging shaft, the prolonging shaft dives into the pump pedestal shell, an opening slot is set on the outer wall of the pump pedestal shell, a sealing plate is set on the opening slot, the sealing plate is fixed on the outer wall of the pump pedestal shell, the left side of the pump pedestal shell is connected to a pedestal bolster, and a blade mesh plate is set in the pump pedestal shell.    USE - The pulping device is useful for biogas liquid pump (claimed).    ADVANTAGE - The beneficial effects of the invention are: adopting the pulping device of biogas liquid pump in biogas pool or septic tank can make the liquids mixed by layer in the biogas pool or septic tank, the biogas broth and the zymophyte are uniformly penetrated, the fermentation concentration and the gas production rate of the biogas pool are increased; the decomposition removal efficiency and the effective utilization ratio of the carbon-rich raw material are improved; thus the invention is convenient for the management of the biogas pool or the septic tank.    DETAILED DESCRIPTION - A pulping device for biogas liquid pump comprises an electric pump and a pump pedestal shell connected by a fixed bolt, where the output shaft of the electric pump is connected to a prolonging shaft, the prolonging shaft dives into the pump pedestal shell, an opening slot is set on the outer wall of the pump pedestal shell, a sealing plate is set on the opening slot, the sealing plate is fixed on the outer wall of the pump pedestal shell, the left side of the pump pedestal shell is connected to a pedestal bolster, a blade mesh plate is set in the pump pedestal shell, the prolonging shaft passes through the center hole of the blade mesh plate, multiple mesh holes are distributed on the blade mesh plate, the lateral edge of the blade mesh plate is fixed in the ring slot in the pump pedestal shell; an S-shaped pulping blade is set at the left side of the blade mesh plate, an S-shaped pre-pulping blade is set at the left side of the S-shaped pulping blade, the S-shaped pre-pulping blade and the S-shaped pulping blade are both fixed on the prolonging shaft; a cutting blade is set between the S-shaped prepulping blade and the S-shape pulping blade, and the blade arm of the cutting blade is fixed on the outer wall of the pump pedestal shell.