Pretreatment device of spraying equipment for steel processing

The utility model discloses a pretreatment device of spraying equipment for steel processing, which comprises a fixed base, one side of the top of the fixed base is provided with a hydraulic device, one side of the hydraulic device is provided with an electric control box, the top of the hydraulic device is fixedly connected with a connecting plate, one side of the connecting plate is provided with a moving seat, and the moving seat is provided with a movable rod. The moving seat is arranged in a U shape, a rack is fixedly connected to the surface of the side, close to the moving seat, of the connecting plate, a first motor is installed at the top of the moving seat, a gear is arranged in the middle of the moving seat, and the output end of the first motor penetrates through the surface of the moving seat and is fixedly connected with the middle of the gear; limiting grooves are formed in the upper end and the lower end of the surface of the connecting plate correspondingly, and limiting blocks are arranged i