Sewage suction and purification device for oyster culture

The utility model relates to the technical field of oyster breeding, and discloses a dirt suction and purification device for oyster breeding. The sewage suction and purification device for oyster breeding comprises a supporting plate, a supporting column is fixedly installed below the supporting plate, a sewage pump is fixedly installed above the supporting plate, a connecting pipe is fixedly installed below the sewage pump, a holding pipe is fixedly installed on the connecting pipe, a connecting shell is fixedly installed above the holding pipe, and a water inlet pipe is fixedly installed above the connecting shell. Through the arrangement of the connecting shell, the connecting shell is inversely buckled at the bottom of the pond during use, a certain gap exists between the connecting shell and the bottom of the pond through the guide wheel and the rubber wheel, water can enter the connecting shell through the gap between the connecting shell and the bottom of the pond, and oysters cannot enter the connect