Diving Device is potable air open loop single tuber diving device, it is made up of mouthpiece breathing apparatus, half face mask, air cylinder, back rack, pressure reducing valve, foot flippers, lead and immersion suit. The immersion suit is made of CR material of double-sides chloroprene rubber composite cloth and is divided into wet and dry two types. The product is extensively used in diving travel, aquaculture, fishery, operation under water and rescue under water.