Main advantages of vertical wood flour machine: This machine composes with three crushing tools: “7” type knife, “YI” type knife and centrifugal to-and-fro knife. (It overcomes many shortcomings of traditional principle.) This machine has fineness analyzer so it can arbitrarily control the fineness of the material. (It overcomes the traditional pulverizers’ many shortcomings owing to low rate of passing the screen.) The feed opening of this machine adopts automatic absorbing type feed, which overcomes the disadvantage of traditional crusher that direct feed and careless throwing of metal block cause wood flour machine suffering from serious damage. The main body and bearings of this machine adopt water cooling and this method can well protect the bearings.