An automotive part was processed by fringe scanning,phase demodulation and unwrapping to obtain 3D points cloud data,and they are processed by noise reduction,data reduction and meshing.Then,the cloud data were divided into 11 regions according to the point cloud curvature distributing nephogram.Firstly,point cloud data of range A were fitted to form a 4×4-order uniform surface.Secondly,the other data left were fitted to surface separately.Finally,the free-form NURBS surface was obtained via surface extension,splicing,chamfering and trimming.The total error of point-surface was 0.2645 mm,and the surfaces have met the criterion of G1 tangent continuation and normal curvature continuation regulations.As a result,the problem of larger fitting error at high curvature has been solved as well as the surface reconstruction accuracy has been improved by using the methods proposed in the article.