To improve the accuracy of camera calibration, after analyzing the Tsai twostage method, the article gives a new camera calibration method based on the CCD area sensors array, and the new composite distortion model. It uses an iterative method without a radical distortion limit, and can be used in many kinds of camera lens distortion cases, and the improved method uses a coplanar set of points, monoview, and the experimental result shows that the algorithm is fast with high accuracy. This camera calibration method can be used in the machine vision research and the industry 3D measurement.