The high-pressure dredging device is structurally characterized in that a high-pressure
power station is mounted on an amphibious
excavator, a
buoy is mounted on the side surface of the amphibious
excavator, a reaming and sucking port with a
reamer is arranged at the end part of an excavating arm at the front end of the amphibious
excavator, the reaming and sucking port is connected with a dredging pump, and the dredging pump is connected with the high-pressure
power station through a driving pipeline. The dredging device has the advantages that the dredging efficiency can be improved, the
adverse effect on the
ecological environment is reduced, and the ecological
system of the river channel can be effectively protected while the river channel is dredged. Particularly, the design of the pump body unit is optimized, large-particle stones and other
solid-liquid mixed foreign matters can be handled, the
trafficability of the
sludge is improved, the
sludge can be transported for a long distance, and the interference to the river channel
ecology can be reduced. The flexibility of an amphibious excavator is integrated, operation can be conducted between water and land, and dredging work can adapt to various environments. The front-end dredging stirring suction head can effectively simplify the tedious process of dredging operation, and the whole dredging device can be compact and efficient by integrating the functions of hinging, sucking and filtering.