The equipment is used for the vehicle sealing inspection, rain, dry room for through type. The water is continuously pumped into the main pipeline from the reservoir, through pressure regulation and flow regulation into the rain pipeline, shot to the surface of the car body through the nozzle, the ejected water is collected into the reservoir, after precipitation filtration, recycling. During the inspection, all doors and Windows are closed, and the driver drives the car in and passes through the rain chamber and the blow-drying chamber in turn.