When designing the hydraulic system of a cutter suction dredger, the first consideration should be the required functions of the equipment, and then the power consumption of each working part of the dredger should be taken into account. The cutter part of a dredger is a high-power, high flow, and harsh working environment part of the hydraulic system, which has high requirements for hydraulic pressure, flow rate, and impact force, and needs to be fully considered