In the traditional video mosaic model and image alignment method, the time-consuming image matching and complicated optical flow computation are the performance bottleneck of real-time mosaic. A real-time panorama imaging method is proposed, which makes use of the geometric structure of the physical scene and the motion information of the train to construct the mosaic region of the video and establishes the geometric model to achieve the alignment of the mosaic region. The entire stitching avoids the complex image processing, realizes the railway panorama real-time acquisition and also provides a lightweight video panoramic index method, which reduces the storage and access cost of the video data.