Underwater repairing method for left and right suction ports of trailing suction dredger

The invention discloses a drag suction dredger left and right suction port underwater repairing method, which is characterized in that a drag suction dredger left and right suction port underwater repairing device is used for repairing, a water blocking tank body is connected with a ship broadside, a sealing air bag is hermetically attached to the water blocking tank body and the ship broadside, and an access hole is opposite to a ship broadside suction port; water in the water blocking box body is pumped out through the external submersible pump, so that a construction environment which blocks water locally and is communicated with the outside is created, a water-free repairing environment is provided for the ship broadside suction port, the ship is prevented from entering a dock, repairing of the ship broadside suction port is achieved, and due to the fact that repairing without entering the dock can be achieved, repairing efficiency is improved. And the repair period of the underwater ...