Abstract: In snowy regions, the combined effects of wind and snow loads are critical in the design of photovoltaic support structures. The research specifically focusing on the combination factors of wind and snow loads for photovoltaic (PV) structures is limited. Based on the characterization of joint wind-snow hazards, uses a single-axis photovoltaic tracker as a case study to investigate the combination factor of wind and snow loads on photovoltaic panels in Harbin. A multi-layer snowmelt model is applied to calculate the ground snow pressure. Various probability models are then used to fit the wind speed and snow pressure samples from different data pairs, with the best-fitting model selected. Linear regression analysis is performed to assess the correlation between the two datasets, which allows for the construction of joint wind-snow hazard contours. Based on this, finite element analysis is employed to calculate the structural load effects, leading to the derivation of the combination factor for wind and snow loads. The study finds that when both wind and snow loads are considered as pressure, and the load effects considered in the design are column axial force and main beam bending moment, the combination factor of wind and snow loads on the photovoltaic panel is 0.7.