Dredging tool for gate groove

The invention discloses a dredging tool for a gate groove. The dredging tool comprises a spray head and a connecting rod. The spray head comprises a spray head air chamber and a plurality of high pressure nozzles mounted on the spray head air chamber. The upper part of the spray head air chamber is cylindrical. The cylindrical top is provided with a flange plate connected to a connecting rod and the cylindrical lower part is a chamfered curved surface. A plurality of mounting holes for mounting the high pressure nozzles are drilled in the chamfered curved surface. A solid cylinder is arrangedat the center of the bottom of the outer side of the chambered curved surface. The solid cylinder serves as an underwater supporting point and protects the high pressure nozzles. The connecting rod isa round tube provided with an air inlet channel, and the bottom of the round tube is provided with a flange plate matched with the flange plate on the upper part of the spray head air chamber, so that the air inlet channel of