Because scene matching system has the characteristic of high precision,it is widely used in all kinds of long-range precision end guidance system.There are big contrast differences between reference image and real-time image due to changes of natural conditions,so it is more difficult to match scenes.Based on the traditional feature extraction,for suburban scene with artificial scene,linear feature is improved by Hough transform and mathematical morphology to improve the matching quality.The effectiveness of this algorithm are verified through the simulation analysis with real scene images.