The difference between this cleaning process and solvent cleaning is that the first two cleaning units: organic solvent cleaning only has a good cleaning effect on asphalt or paint chips, but cannot clean inorganic substances such as grinding powder; Semiwater-based cleaning agents are different. They can not only clean organic pollutants such as asphalt, but also have a good cleaning effect on inorganic substances such as grinding powder, greatly reducing the cleaning pressure of water-based cleaning agents in subsequent cleaning units. The characteristics of semi water-based cleaning agents are slow evaporation rate and low odor. The equipment cleaned with semi water-based cleaning agents does not require sealed condensation and distillation recovery devices in each cleaning unit. However, due to the high viscosity of the semi water-based cleaning agent and its emulsifying effect on the water-based cleaning agent used in subsequent processes, the second unit needs to be rinsed with tap water and set to running water rinsing.