The utility model belongs to the technical field of
medical instruments, and discloses an
optical navigation auxiliary puncture device capable of being freely held, which comprises a base, a spacer ring, a
lantern ring and reflective stickers, a plurality of circular grooves distributed annularly are arranged on the outer circle of the base and the outer circle of the
lantern ring, the reflective stickers are pasted in the circular grooves to form a polyhedral reflective marking structure, and the reflective stickers are arranged on the base and the outer circle of the
lantern ring. A distance ring is connected between the base and the lantern ring, and different lengths of the distance ring are set according to different types of puncture needles so as to control the distance between the lantern ring and the base. The device is provided with an annular polyhedral reflective mark structure, the camera at each angle can
shoot a mark point and track the position and posture of a needle point in real time, meanwhile, the distance ring is arranged between the base and the lantern ring, different puncture needle models are matched through the length of the distance ring, the position of the needle point is automatically calculated, a doctor does not need to input, input errors are avoided, and the accuracy of the device is improved. And the calibration accuracy is improved.