Abstract: A method about 3D visualization of radar detection range in complicated environment is presented. Based on the formula of radar, this method considers the influence of terrain and electronic jamming. First, a radar detection range model in the free space is built by using uniform sampling method, and then according to the terrain elevation around the radar, an algorithm of 3D visualization of radar detection range is proposed to represent the 3D radar detection range affected by terrain. Based on jamming formula, the radar detection range considering the influence of multi-electronic jamming is implemented. Besides, by using view-dependent simplification of model the speed of rendering is improved. The result of experiment shows that this method not only is efficient but also can visualize radar detection range.