The bucket wheel dredger is developed from general cutter suction dredger. It is a new type of hydraulic dredger. The dredger is a combination of land excavating bucket wheel and cutter suction dredger, which improves the cutting and dredging ability of the dredger, and increases the productivity while reduces the energy consumption of dredging and winch swing. Its ability to dredge and cut the soil layer is very strong, which is suitable for dredging hard soil, cohesive soil and dense sand, ore and other materials.