Panoramic image mosaic technology is a 360-degree circular image that combines the images of some overlapping areas to describe a particular scene. In this paper, a novel image sorting algorithm based on SIFT (Scale Invariant Feature Transform) feature matching is proposed to achieve the orderly arrangement of images. Aiming at the problem that the image mosaic has many mismatch points and takes a long time,the FAST algorithm is used to extract feature points. And then, an auto-correcting operation is adopted for the brightness difference between the adjacent ordered images to reduce the brightness difference, and the modified Ransac algorithm is used to eliminate the mismatching points. Finally, the Weighted Equalization Algorithm is used to realize the Fast fusion of the image. The experimental results show that the algorithm is stable and efficient.