Oxygenating device for culture pond

The utility model relates to the technical field of oxygenation equipment for culture ponds, and particularly discloses an oxygenation device for a culture pond, which comprises an aerator, an air delivery pipe, a nano aeration pipe, a cross arm, a first hard pipe, a second hard pipe and a plurality of air nozzles, the cross arm is fixedly connected to the top of the culture pond, the first hard pipe is longitudinally and rotatably connected in the cross arm, and the second hard pipe is longitudinally and rotatably connected in the cross arm. The bottom end of the first hard pipe is closed, a first exhaust port and a second exhaust port which are transversely protruded are formed in the lower part of the first hard pipe, the first end of the nano aeration pipe is connected with the first exhaust port, the first end of the second hard pipe is connected with the second exhaust port, and a plurality of third exhaust ports which are transversely protruded are formed in the surface of the second hard pipe. The mul