The wood chip hammer mill is fixed with an engine and a power of RP-driven all kinds of different power. After the raw materials were put into crushing chamber, the high-speed operated hammer sheets will impact the raw materials over and over again, then the raw materials will be crushed into pre-set size step by step. Then the crushed materials will be leak out from the sieve. The draught fan will convey the leaked materials into separator centrifuge. Finally, the powder material will be discharged down below and the air will be discharged upper.