By scanning each mesh point of the wave-front, a kind of wave-front reconstruction method is proposed. Based on Hudgin model, the known P reference points are chosen at the diagonal of aperture array. For each reference point, one wave-front is obtained by scanning row data of the array, and another wave-front is obtained by scanning column data of the array. So, 2P wave-fronts are obtained for the P reference points. The average of the 2P wave-fronts is the required. How to choose reference point is introduced. It leads to that the high-low coordinates symmetrical arrange reference points are optimum selection. An error estimation model of wave-front is made. It is concluded that wave-front error is improved as the number of reference point increases. Experiments are performed for the new method and the traditional matrix inversion method. The result of experiments shows that the two methods have equivalent effect, and the new method has less amount of calculation and better practicability.