The wetting machine is generally applied in livestock and poultry farms, to handle dead chickens, ducks, pigs, cattle, sheep and other animals. The wetting machine is generally equipped with a steam generator. The high-temperature steam generated by the steam generator is continuously transported to the interior of the wetting machine through pipelines and directly contacts with the animal carcass tissue. When the steam condenses into water upon encountering the animal carcass, a large amount of heat energy is released, which can melt the grease and solidify the protein. At the same time, with the help of high temperature and high pressure, the pathogens can be completely killed.