The invention discloses a wet-type sauna air supply system. The wet-type sauna air supply system comprises a steam generation device, an extraction device, air supply pipelines and heating devices. A cover plate is arranged at the top of a shell. A liquid accumulating tank is arranged inside the shell. An atomizer is also arranged inside the shell and is sleeved with the liquid accumulating tank. The liquid accumulating tank is filled with liquid water, and the atomizer can atomize the liquid water into water vapor. The extraction device is arranged at the top of the steam generation device and comprises an extraction shell, a stirrer, an extraction filter screen and a flow guide pipe. The air supply pipelines can convey the water vapor into a plurality of sauna rooms. The heating devices are arranged on the air supply pipelines in a sleeving mode and can heat steam generated by the atomizer. By means of the wet-type sauna air supply system, energy consumption can be reduced, gases beneficial to the good health of people and rich in health preservation effects can be generated, and meanwhile the wet-type sauna air supply system is simple in structure, convenient to operate and reliable to use.