A kind of suction device for
surgical instrument, it is easy to assemble, including embracing component and smoking component.The embracing component includes embracing piece and rotating nut, and embracing nut.The smoking component includes
smoke exhaust cavity component,
smoking pipe, locking nut, and
smoke exhaust pipe.The suction device is arranged on scalpel, and the scalpel includes knife rod component.The embracing piece includes gripper hand, and is located on the wedge surface of gripper hand.When the rotating nut pushes the embracing nut towards the smoking component, the gripper hand moves along the wedge surface towards the inner wall of the embracing nut, and is inwards retracted to embrace the knife rod component.The
smoking pipe is sleeved on the knife rod component.The
smoking pipe, the
smoke exhaust cavity component, the smoke
exhaust pipe form a smoking channel for suctioning away smoke.