An efficient method to acquire multi-view parallax images for multi-view auto-stereoscopic display from two parallax images is presented. Firstly,the feature matching of the two given parallax images by using SIFT matching algorithm is done and the dense matching the images is accomplished after the propagation of the SIFT matching points. Then,the parallaxes are approximately calculated by the coordinates of the matching points to generate the depth map of the left image. At last,a method using an original image and its depth map to acquire multi-view parallax images is proposed. Good stereoscopic images are presented on an auto-stereoscopic display device after the parallax images were synthesized.