The working principle of this series of electric pumps is to generate centrifugal force through the rotation of the impeller, which draws liquid into the pump body from the suction port, then flows through the gap between the impeller and the pump body, and finally discharges it from the outlet. Due to the perpendicular rotation direction of the impeller and the flow direction of the fluid, a high head and high flow rate operating state can be generated. Its "multi-stage impeller" structure has the characteristics of high efficiency, large flow rate, and high head that is not easily blocked, and is widely used for deep well water lifting and mine water supply. For long- distance water irrigation and the transportation of non corrosive chemical liquids in the food and chemical industry.