Hull self-drainage system of energy-saving aluminum alloy boat

The utility model discloses a hull self-drainage system of an energy-saving aluminum alloy boat, and belongs to the technical field of marine drainage systems. A self-drainage channel is arranged at the joint of the deck of the ship body and the ship board; a water discharging hole is formed in a ship board at the side part of the self-water-discharging channel; a PVC drainage pipe is fixed in the drainage hole; the PVC drainage pipe penetrates through the drainage hole, an internal thread matched with an external thread of a lead screw of the screwed plug device is arranged in the PVC drainage pipe, the lead screw is detachably connected with the PVC drainage pipe, the end of the lead screw is connected with a screwed plug seat, a sealing ring is arranged at the joint of the lead screw and the screwed plug seat, and a rotary button is arranged on the screwed plug seat. The ship has the advantages that when accumulated water appears on the deck, the accumulated water can automatically flow into the self-drain