Calibration is an important process in 3D vision measurement for the structured light system. The calibration results influence measurement accuracy. After studying the properties of lens distortion, a new calibration method is proposed in which the target region is divided into many sub-regions of concentric rings formed by treating the optical axis as a center point along with a given radius. Then, according to the reprojection method, calibrations are done one by one. Since this method takes the impact of large filed of view as well as lens distortion into account, calibration accuracies of both local and global regions are improved dramatically. The experimental results show that to the field of about 1050 mm×750 mm divided into two regions, the accuracy for projector calibration increases by 72.8% and the system precision reaches 28.9 μm, which indicate the advantage of this method on distortion processing. The method does not rely on any special calibration equipment, and operates easily and conveniently with good accuracy. It is proved that the proposed method can meet measurement requirements of large field, high precision, and be more compatible to real-time system.