The wind field of near surface topography is controlled by the terrain factors such as slope and aspect, surface morphology and spatial pattern, thus affecting people's "wind feeling", which is important in the site selection and layout of human settlements. By establishing 3D terrain model, dividing grid and setting simulation conditions, this paper uses Fluent 14.0 to simulate the wind field of different slope, shape and pattern of mountain terrain. The results show that:(1) the slope below 0.3 has little influence on the terrain wind field; when the slope is greater than 0.5, the wind shadow area of leeward slope gradually increase with the increase of slope, and the wind resistance effect is more obvious; when the slope is larger than 0.7, the return vortex becomes more obvious with the increase of wind shadow area. (2) The wind field is affected by the surrounding terrain, especially the change rate of the windward and leeward sections. The larger the change rate of windward section is, the faster the wind speed changes; the greater the change of leeward cross-section is, the greater the probability of occurrence of wind shadow area and circumfluence vortex on leeward side. The presence of a concave inlet on the windward side will strengthen the gas retention zone, while the rear of the concave opening on the leeward side will increase the probability of the occurrence of wind shadow area and reflux vortex. (3) Different terrain patterns can strengthen and weaken the wind field of a single terrain. Through the simulation of the traditional terrain pattern of "surrounded by mountains on three sides", it is found that the relatively closed pattern is conducive to the formation of stable wind field and the improvement of wind comfort. When constructing and improving the windsense of human settlements, it is necessary to avoid the wind sensitive areas in different terrain, such as high wind speed ratio area, reflux vortex area, turbulent area without fixed wind direction,no wind area and vortex area of air circulation. Vegetation or artificial structures should be used to remove or weaken the wind sensitive area. According to different climate types and urban characteristics, the windsense can be improved through site selection, terrain transformation or internal terrain pattern adjustment. The open terrain pattern,the streamlined terrain parallel to wind with low slope can enhance ventilation, while the closed terrain pattern, the steep terrain vertical to wind can reduce wind speed.