Oxygenation device for fish farm

The utility model relates to an oxygenation device for a fish farm, which belongs to the technical field of aquaculture fishery and comprises an air extracting pump and a fixing rod, the fixing rod is rotatably connected to the bottom of the air extracting pump through a rotating mechanism, the top of the air extracting pump is communicated with an air inlet pipe, one side of the bottom of the air extracting pump is communicated with an L-shaped air outlet pipe, and the L-shaped air outlet pipe is communicated with an air outlet pipe. A plurality of air outlet holes are formed in the bottom of the horizontal end of the L-shaped air outlet pipe, a driving motor is mounted in the fixing rod, the output end of the driving motor is fixedly connected with the bottom of an air extracting pump, and a mounting mechanism is connected to the bottom of the fixing rod; according to the circulating oxygen supply device for the water depth area, air can be brought into the water depth area through cooperation of the air ex