Wood shredder over cutting, tearing and extrusion to reduce material size, widely used in waste plastics, waste rubber, wood and other large volume waste. Wood shredder because of the particularity of breaking raw material, Tian Rui specialized in cutting tools, a lot of wood is cylindrical or square wood, cylindrical wood after entering the rip machine, with the rotation of the cutter, the log is easy to rotate, not easily stuck wood, thus causing a waste of time. Low work efficiency, the same square wood is the same, our company designed Wood shredder knife plate is more conducive to clamp wood, prevent wood from useless reversal, so that more can increase the efficiency of Wood shredder. Tian Rui Machinery introduced the European and American experience in manufacturing this kind of equipment for more than thirty years. According to the domestic actual situation, we improved and developed, introduced the technology mature and the design advanced rip machine series, which provided the quality equipment for the breakage and volume reduction treatment of the waste recovery and utilization in our country. There are some metals in some wood, such as nails and other metals, which can be easily rip up in our Wood shredder, and the tearing machine can be tore together while tearing the wood, but it is only necessary to pick out the metal in the later recovery process. A direction for future development of the equipment.