The development of mountain photovoltaic power station construction is rapid and the prospect is bright. Photovoltaic bracket products have been introduced, and photovoltaic flexible cable truss structure has emerged. By adding a wind-proof system based on the single-layer cable flexible photovoltaic bracket, the structure could well adapted to complex terrain. The stress of cable truss structures is more complex, and there is currently a lack of unified design specifications. In order to study the structural performance of photovoltaic flexible cable trusses, the finite element method was used to simulate and analyze multi-row large-span photovoltaic flexible cable truss with different structure and different arch height. The modes, wind vibration coefficients and limit working conditions of different structures were analyzed. The results show that the increase in the arch height of the wind-proof cable is beneficial to the suppression of wind-induced vibrations of both inverted arch and forward arch structures. Analyze four extreme working conditions, and for every 100mm increase in height, the minimum average reduction rate of Z-direction displacement in the inverted arch is 10.07%, and the minimum for the normal arch is 2.79%. At the same time, the mechanical properties such as deflection deformation and axial force of the inverted arch structure are better than those of the regular arch structure, and it has more market application value.