The  drum wood chipper machine usually uses two sets of tools, a fixed blade (bottom blade) and a spindle flying blade. The tool material is usually manganese steel, chromium-containing tool steel or other special blade steel. The machine base is made of high-strength steel through CNC machining and robot welding and it is the supporting foundation of the whole machine. 2-3 pieces of flying blades are installed on the blade roller, and the flying blade are fixed to the blade roller by pressure blocks with specially manufactured flying blade bolts. According to the different thickness of the raw material to be cut, the upper feeding roller assembly can be raised and lowered within a certain range with the help of a hydraulic system. The discharge port is equipped with a durable alloy steel screen, and the qualified pieces of cutting material fall through the screen holes and will be discharged from the bottom through the discharging belt conveyor, and the material which is too large will be cut in the machine.