As an important dimensional parameter,wheel center is always measured manually,therefore a high precision measurement method based on stereo vision is proposed in this paper.The edge grouped algorithm and ellipse fitting algorithm are applied to extract the circle shape of the steel ring,then the subsection stereo matching algorithm is used to acquire the 3D coordinate of interest points in the circle shape.Finally through the 3D plane fitting algorithm,coordinate transformation algorithm and circle fitting algorithm,the 3D coordinate of the wheel center is calculated.Measurement experiment results show that the method can acquire the 3D coordinate of the wheel center efficiently,thus lay a foundation for other vehicle parameter measurement.