Water-gas separation diving breathing machine

The utility model discloses a water-gas separation diving breathing machine which comprises a diving breathing machine body and a water-gas separation box. The water-air separation box is communicated with an air inlet pipe of the diving breathing machine body, and the water-air separation box is communicated with an air compressor of the diving breathing machine body through an air outlet pipe; and the position of an air inlet of the air outlet pipe in the water-air separation box is higher than the bottom surface of the inner side of the water-air separation box. When the diving breathing machine is applied to diving, the sealing box can enable the diving breathing machine to float on the water surface, air doped with water can enter the water-air separation box through the air inlet pipe, and in the water-air separation box, water can fall to the bottom of the water-air separation box under the action of gravity, so that water-air separation is achieved; when the water is separated from the air compressor,