The invention relates to a jet device for an indoor high-density shrimp culture pond, a jet type water pushing oxygenation system and a using method of the jet type water pushing oxygenation system. The jet device comprises a suction piece and a pressure diffusing piece, wherein a water inlet is connected to one end of the pressure diffusing piece, a nozzle is connected to the other end of the pressure diffusing piece, the suction piece is connected to the nozzle in a cooperating manner, a mixing chamber is arranged in the suction piece, the nozzle communicates with the mixing chamber, and atleast part of the nozzle is inserted into the mixing chamber; and the suction piece is of a three-way structure, one end of the suction piece is connected to the pressure diffusing piece, an air inletis formed in the other end of the suction piece, a diffusing pipe is connected to the third end of the suction piece, and the nozzle, the mixing chamber and the diffusing pipe are coaxially arranged.The jet device disclosed by the invention is suitable for the indoor high-density shrimp culture pond, the structure and the performance are both optimized and improved, the gas-water ratio is increased, more and fine bubbles are generated, and the oxygenation efficiency is high; and besides, the jet device also has the advantages of low manufacturing cost, simplicity and convenience in mounting,no maintenance, long service life and the like.