Abstract: In recent years, a new cable-supported photovoltaic power plant structure has been widely promoted and applied. Some scholars have studied the mechanical properties of this structure. However, the existing studies focus on the wind loading influence on structural stability and safety. As a long-span cable net steel structure, the influence of temperature effect on the mechanical properties of the structure can not be ignored. Therefore, this study systematically analyzes the temperature effect of the new cable-supported photovoltaic power plant structure. Ansys finite element method is used to simulate the influence of temperature effect on the cable force of cable-supported photovoltaic power station. Several working conditions, including temperature effect alone and, combined effect of temperature and wind and snow loading, were calculated to reveal the influence of temperature effect on the internal forces of cable structures. The results show that due to the effect of photovoltaic modules, the cable force along the length direction showed a "sawtooth" distribution. When there is no wind and snow loading, the temperature influence coefficient of the cable structure is a constant value. The temperature influence coefficient of the cable structure decreases with the increase of wind and snow loading. Based on the calculation results and considering the external loading conditions, spans, and inclination angles of photovoltaic modules, a simplified analysis model and an empirical formula for cable force analysis of cable-supported photovoltaic power station are proposed. The simplified analysis model and the empirical formula of cable force analysis were used to calculate the cable forces of different structures under various working conditions, which are compared with the finite element analysis results, the calculation error is less than 1%. It verifies the accuracy of the method.