Temporary iron scrap storage device and method for large planer type milling machine

A scrap iron temporary storage device and method for a large planer type milling machine comprises a scrap iron temporary storage box, a tray and a track, the track is arranged below a scrap conveying chain, the tray is placed on the track and can move on the track, the scrap iron temporary storage box is placed on the tray and comprises a box body with the periphery closed, the box body is provided with lifting lugs, and the lifting lugs are arranged on the periphery of the box body. The bottom is formed by folding two door plates and can be opened and closed downwards, opening and closing devices used for locking the door plates are arranged on the front side and the rear side of the box body, rolling wheels are arranged on the bottom faces of the door plates, and the door plates are slowly opened and closed through rolling and supporting of the rolling wheels; after the scrap iron is fully stored, the scrap iron temporary storage box is hoisted to a designated position, the door plate is opened downwards t