As wind-sensitive structures， the standing seam roof system （SSRS） will be damaged to different degrees or even fail under wind load with different strength grades. To reduce the wind-induced damage， an analysis method of wind fragility is proposed for SSRS based on the multistage performance levels. A mechanical model of the SSRS is established to analyze the failure patterns and the whole process of wind-induced damage； The relative displacement of the large rib nodes of the roof panels is used as the quantitative indicator， and the three-stage performance level and quantitative model of the SSRS is divided and derived； Then， combined with the wind fragility analysis method of probabilistic reliability， the wind fragility analysis is carried out on the SSRS in a typical project. The analysis results show that the fragility curves obtained by the proposed method can well predict the damage state of the SSRS. The wind speed ranges corresponding to light damage， moderate damage， severe damage and wind-uplifted failure are 0~14.9 m/s， 20~26.8 m/s， 30~46.9 m/s and more than 46.9 m/s， respectively， which can be used as a reference for the engineering design and practice of the SSRS.