Positioning system and machining positioning method of woodware machining device

The embodiment of the invention discloses a positioning system and a machining positioning method of a woodware machining device. The positioning system comprises a feeding bin, a finished product bin, a clamp unit and a workpiece positioning unit, wherein a blocking and leaning mechanism is arranged on the feeding bin and is used for feeding and positioning a workpiece, the clamp unit comprises abase frame, a driving pneumatic chuck and a driven pneumatic chuck, the driving pneumatic chuck and the driven pneumatic chuck are oppositely arranged at the top of the base frame, the workpiece positioning unit comprises three groups of jacking platforms which are arranged side by side, and two pressing air cylinders which are oppositely arranged are connected to the table surfaces of the jacking platforms in a sliding mode. According to the positioning system and the machining positioning method, a square log is placed on the blocking and leaning mechanism to be fed and positioned, meanwhile, the pressing air cylin