Ultrasonic cleaning is the use of ultrasonic cavitation, acceleration and direct flow in liquid to directly and indirectly affect the liquid and dirt, so that the dirt layer is dispersed, emulsified and peeled to achieve the purpose of cleaning. It take the advantages of good cleaning, High cleanliness, fast cleaning speed, improve efficiency, no damage to the surface of the parts, deep holes, fine seams and hidden area of the parts can also be cleaned and so on.