Highway bridge precast beam maintenance device and method

The invention relates to the field of highway bridge construction, and particularly discloses a highway bridge precast beam maintenance device and method.The device comprises a box body, a spraying mechanism is installed on the front side of the box body, a movable base is rotationally connected to the lower portion of the box body, and a water sweeping brush is connected to the rear side of the movable base; the spraying mechanism is connected with a water supply pipe, the water supply pipe backwards penetrates through the movable box body and then is connected with a pipe coiling device, and the pipe coiling device is connected with the water tank. When the device moves to one end of the precast beam, the movable base rotates by 180 degrees around the box body and continues to move towards the other end to continue to spray the precast beam. According to the device and method, spraying is specially conducted on the interior of the precast beam component, redundant spraying water is recycled in time, the pre