The working principle of the medical cleaning machine is the antirust boiling cleaning after ultrasonic cleaning and rinsing. It is to add a proper amount of silicone oil after the object is cleaned with high cleanliness and boiled at high temperature for a certain time. Under the action of high temperature boiling water, the solution in the tank is dynamically rolled with strong water bubbles. At the same time, the protective oil has a strong diffusion and wetting ability, and forms a protective film evenly on the surface of the instrument without leaving a dead corner, The bacteria and microorganisms of the object are killed while effectively controlling the re-pollution of bacteria.