Surgical instrument and surgical robot

The invention provides a surgical instrument and a surgical robotic.The surgical instrument comprises an executing part used for executing an operation, a driving disc, a transmission mechanism, a rotation tube and a clamping tube, and the driving disc is used for being connected with a mechanical arm of the robot and receiving and converting power of the mechanical arm into rotation driving force; the transmission mechanism comprises a driving wheel and a driven wheel, the driving wheel is connected with the driving disc, the driven wheel is in transmission connection with the driving wheel, and the driven wheel is tubular; the autorotation pipe is sleeved with the driven wheel and rotates along with the driven wheel, and a sliding groove is formed in the autorotation pipe; the clamping pipe is connected to the sliding groove through a first rotation key so as to rotate along with the rotation pipe when the rotation pipe rotates, the first rotation key can slide along the sliding groove so that the clamping