Skull cutting penetration detection method based on abrupt change current

The invention discloses a skull cutting penetration detection method based on abrupt change current. The detection method specifically comprises the following steps that no-load current is recorded, tool setting current and saw penetration current are set, tool setting operation is carried out, whether tool setting succeeds or not is judged, tool retracting and feeding cutting are carried out, whether saw penetration succeeds or not is judged, and the skull cutting penetration detection method is shut down and returns to the initial position. The real-time working current of a direct current motor driving a saw blade to work is detected, the no-load current is recorded, the tool setting current and the saw penetration current are set, the tool setting current and the saw penetration current are compared with the no-load current, and therefore the current state of the saw blade is judged. Whether the saw blade makes contact with the skull to complete tool setting or whether the saw blade saws through the skull