Pre-cleaning device for metal surface treatment

The utility model discloses a pre-cleaning device for metal surface treatment. The cleaning device comprises a cleaning box, two connecting plates are arranged on the upper surface of the cleaning box, a transmission mechanism is arranged on the outer wall of one side of each connecting plate, two or more clamping mechanisms are arranged on each transmission mechanism, a fixing frame is arranged on the outer wall of one side of each connecting plate, and a spray-washing mechanism is arranged on the outer wall of one side of each fixing frame. By arranging the spray-washing mechanism, a water pump is started, water in a cleaning box is pumped out and conveyed into a water tank through a water conveying pipe, then the water enters a flow equalizer through a telescopic pipe, the water is sprayed out through a high-pressure spray head, cleaning of the metal surface is achieved, the water obtained after spray-washing directly falls into a connecting plate, and the water is filtered through a filtering plate; and m