The wind tunnel experiments were carried out to study the impact of high-density building clusters and high-rise building on the wind environment,in case of different surface roughness and wind directions.The Shanghai Lujiazui Finance & Trade Zone and Shanghai Tower were selected as the test subject areas.The results show that the large wind area increases with the decrease of surface roughness,and the wind direction is easily affected by the building cluster distribution and arrangement.Under some conditions,the wind vector is varied at different height of high-rise building due to its inconsistent shape at upper and lower levels.According to a foreign wind environment comfort criteria on tall building,the average wind velocities at pedestrian level are evaluated,and three bad areas in aspect of wind environment are listed.