Laser active imaging combines laser technology，range-gated technology，weak target imaging technology and so on.Because of its high resolution，strong anti-interference ability and the ability to generate three - dimensional image，it is widely used in various areas of detection.But in this way，the image's field of view is usually small，which is not conducive to global observation and analysis.A panoramic stitching method based on the improved SURF algorithm is proposed，and it can quickly match target features of adjacent scenes.The efficiency of this approach and stitching effect are tested through the experiments.The results show that this method can increase the visible range and improve comprehensive ability of observation and analysis，which lays a theoretical and experimental foundation for high-speed real-time large field of view observation.