The utility model discloses a spectacle frame scanner, which comprises a first one-dimensional moving platform, a rotating platform, a second one-dimensional moving platform and a length measurement mechanism. The length measurement mechanism comprises a capacitance-grid sensor and a length measurement module, a fixed grid of the capacitance-grid sensor is fixed on a base of the second one-dimensional moving platform, a movable grid is arranged on the second one-dimensional moving platform and used for sensing moving distance of the second one-dimensional moving platform, the length measurement module is used for acquiring the geometric center of a spectacle frame or spectacle frame supporting plate to the edge of the spectacle frame or spectacle frame supporting plate according to received data of the capacitance-grid sensor, and the second one-dimensional moving platform and the base of the second one-dimensional moving platform are connected through an elastic component in a moving direction. Scanning precision of the spectacle frame scanner can be increased.