Under the action of wind load, the parabolic solar collector (PSC) is easily damaged. In order to ensure the stability and security of the flat roof parabolic solar collector (FRPSC), understanding the wind load effect on the FRPSC has always been an important research direction. This article studies the free vibration and wind-induced response characteristics of the FRPSC, and analyzes the optimal stow position of the FRPSC under strong wind. The modal analysis and wind-induced response calculation of the FRPSC are done through wind tunnel pressure experiment and finite element simulation. The changing laws of the FRPSC dynamic characteristic parameters, peak displacement response, and wind-induced vibration coefficient are obtained. The wind-induced response mechanism of the FRPSC under different working conditions is analyzed in detail. In addition, a comparison with the ground parabolic solar collector is made. Based on the research results, an optimal stow position is analyzed and proposed to minimize the impact of strong wind on the collector. This research work can provide a useful reference for the security design of the FRPSC.