Compressed gas humidifying device

The utility model discloses a compressed gas humidifying device which comprises a tank body, a tube shell is vertically fixed on the bottom face of an inner cavity of the tank body, the top end of the tube shell is open, the bottom end of the tube shell is connected with the bottom face of the inner cavity of the tank body in a sealing mode, and a gap is reserved between the top end of the tube shell and the top face of the inner cavity of the tank body. A heating cavity is formed between the outer wall of the tube shell and the inner wall of the tank body, the heating cavity is filled with a purified water layer, in the working process, the purified water layer can be heated through the electric heating plate, gas in the compressed gas tube at the normal temperature can be preliminarily heated after passing through the heated purified water layer, and the gas is converged with water vapor generated by the purified water layer in the tank body; the humidity is increased; and meanwhile, the heated and humidifi