Future digital battlefield is crying for a 3D representation of the radar coverage affected by complex environment such as terrain, ocean and weather. However, recent researches still focuses mainly on 2D representation while the existing 3D methods are always embarrassed by their low computation speed, a new hardware accelerated 3D representation method was put forward in this paper. Based on the constructed 3D data field of EM loss affected by environment, a hardware accelerated algorithm was designed to extract the isosurface for building the 3D radar coverage model. Then the model was represented into digital battlefield. In the experiment on popular PC and for typical Radar, the 3D radar coverage affected by terrain and atmosphere was vividly visualized in time. The result has overcomed the implicity of 2D method and the slowness of 3D method, thus providing excellent decision and sense supporting for users.