The utility model discloses a CNC engraving machine with clean function, including quick -witted case, workstation, sculpture machinery arm, dump bin, slide rail and the activity lantern ring, the topfixed mounting of machine case has the workstation, and the bottom swing joint of the workstation slide rail that passes through the top and the mechanical arm of sculpture, it comprises fixed montant, slider, fixed horizontal pole, carving tool, SMK spindle motor, connecting rod and the activity lantern ring to carve mechanical arm, carve mechanical arm and pass through the slider of bottom andthe slide rail swing joint at workstation top, and the both ends of the fixed montant of slider through the top and fixed horizontal pole are connected, fixed horizontal pole is by the one end swing joint of the intermediary movable lantern ring with the connecting rod, and the top that SMK spindle motor and carving tool are passed through to the bottom of the connecting rod other end hinges mutually. The utility model discloses a set up the dump bin at the top of the mechanical arm of sculpture, set up the breathing pipe in one side of carving tool simultaneously, reached and carried out theclear effect of synchronization to carving tool work.