Crushing device and granular wood fiber production equipment

The utility model relates to the technical field of processing devices, in particular to a smashing device and granular wood fiber production equipment, which comprises a smashing machine support frame, a driving motor, a tightening wheel and a limiting component, a smashing box is erected on one side of the upper end of the smashing machine support frame, and a smashing shaft is horizontally inserted into one side of the smashing box through a bearing in a penetrating manner; the driving motor is horizontally arranged on one side of the upper end of the pulverizer supporting frame, one side of the driving motor and one side of the pulverizing shaft are each sleeved with a driving belt wheel, a tightening wheel is arranged on one side, close to a supporting leg of a driving belt, of the pulverizer supporting frame, and then the position of the tightening wheel is stably controlled to move up and down through a control assembly. When the driving belt is loosened after being used for a long time, the driving be