Square pond culture blowdown system for pacific white shrimps

The invention relates to the technical field of cultivation, in particular to a square pond culture blowdown system for pacific white shrimps. The square pond culture blowdown system is installed in a square shrimp cultivation pond, oxygen conveying pipes are arranged at the positions, close to the four side walls of the shrimp cultivation pond, of the pond bottom of the shrimp cultivation pond respectively, and the oxygen conveying pipes are laid in the mode that the first ends of the oxygen conveying pipes abut against the side walls of the shrimp cultivation pond and the second ends of the oxygen conveying pipes are about 1 m away from the side walls of the shrimp cultivation pond; the oxygen output direction of the oxygen conveying pipes is arbitrary, a sewage suction pipe is arranged in the middle of the pond bottom of the shrimp cultivation pond, a plurality of sewage suction openings are formed in the bottom surface of the sewage suction pipe in the length direction of the sewage suction pipe, the firs