The invention discloses a live skin cleaning process in a railway vehicle depot, which comprises a top fan unit, a porcelain vase, a locomotive unit, an automatic car washing system, an insulation detection module, a drainage ditch and a dry filter. The beneficial effects of the present invention are: adopting the air drying and filtering device, utilizing the difference in specific gravity between water and air, the air containing water molecules passes through several rows of vertical condensation pipes, the water molecules are attached to the walls of the condensation pipes, and the dry air flows out from above. In the cold season, the condensate pipe adopts electromagnetic heating to ensure that the air is dry, and a special intelligent air nozzle is used to automatically adjust the wind belt strength between the car net and the car net according to the absolute humidity of the air in the warehouse. Form an insulating dry air zone between the car nets, use intelligent water nozzles and brush bows, when washing the car, ensure that the water spray angle, water pressure, water temperature, and vehicle speed change, the flow of water will not overflow a lot, and ensure that the car wash water does not flow into the car wash in large quantities outside the area.