High precision optical tracking tool

A high precision optical tracking tool, comprising a rigid support frame (1), a main marker point group, and a second marker point group; the main marker point group comprises more than three first marker points (2), the first marker points (2) all being arranged on the rigid support frame (1); the second marker point group comprises one or two second marker points (3), and when the high precision optical tracking tool is mounted on a device to be positioned, the distance between the second marker points (3) and each first marker point (2) is greater than 50 mm. When used in a surgical robot, the main marker point group is mounted on the surgical robot body (4) by means of the rigid support frame (1), and the second marker point group is arranged on a tail end tool (5); as the marker points in the second marker point group are closer to specific points on the tail end tool (5), positioning precision can be significantly improved. In addition, by means of changing the structure of the second marker point group, different shapes can be formed with the main marker point group, enabling identification of the second marker point group.