Drum re-chipper can chip the large wood sheet, waste veneer, and the bark into small sheets as the raw materials of wood based panels or fuel. It also can be used to cut shredded paper and cardboard, and also can be used to crumble plant straw cellulose, such as cotton stalks, bags, waste flax, jute shank, and wild couch grass and straw, which can be the raw materials of particle board or press board.