Solar energy independent power supply is one of the important ways to solve the power supply problem of long-term field observation activities in the Antarctic region. According to the specific environment of polar region, a mobile photovoltaic (PV) power supply device based on container was designed. Firstly, the calculation model of solar radiation on the inclined plane of PV modules under the constraint of structural integration was constructed, and the optimal inclination angle of PV modules was determined; secondly, CFD (computational fluid dynamics) method was used to analyze the wind load of PV modules at the optimal inclination angle and different wind direction angles, and the typical wind load conditions of PV modules were determined; finally, the mechanical properties of PV bracket under typical working conditions were analyzed by finite element method. The results showed that for the integrated double row PV modules, the optimal inclination angle of the upper and lower rows of PV modules were 29° and 39° respectively. There were three typical working conditions for PV modules: when wind direction angle was 20°, all PV modules were subject to downward pressure; when wind direction angle was 120°, one row of PV modules was subject to downward pressure and the other row was subject to upward lifting; when wind direction angle was 140°, both rows were subject to upward lifting. Under three typical working conditions, the maximum stress of the PV bracket was 103.93 MPa, and the safety factor was 2.98, which met the strength requirements; the hinge joint of 2 rows of PV brackets had large deformation, with the maximum value of 4.33 mm; the bracket deformation distribution was greatly affected by wind direction, in which the deformation on the windward side was up to 3.7 mm, and the deformation on the other side was less than 1 mm. The research results can provide some reference for solving the power supply problem of long-term field independent observation activities in the polar region.