Pulp pump is a kind of machinery widely used in the paper industry. The two-phase flow pulp pump adopts the principle of "relative suction and relative blockage" in the two-phase flow theory to carry out the hydraulic design of the pump, so that the hydraulic performance of the pump's flow-through components conforms to the law of solid-liquid two-phase flow, thereby reducing the amount of slurry The body's erosion and wear of the flow-through components greatly improves the working efficiency and service life of the pump