Abstract: Firstly,in this paper,a wind tunnel test is carried out in the atmospheric boundary layer wind tunnel of the HD-3 in Hunan University.The time history of wind pressure of trough concentrator under different working conditions are obtained.Then,the windinduced dynamic response of the trough concentrator is analyzed through finite element model,so that the peak displacement response and wind-induced vibration coefficient of the mirror are obtained.In addition,the nephogram of displacement response distribution under the most unfavorable working conditions is given.Finally,the section size of the supporting structure of trough concentrator are optimized.The results show that,the maximum peak displacement response appears near the midpoint of the span wise of the concentrator under various working conditions.The overall weight of the optimized structure is reduced by about 6% compared to the original structure.