A solar tracking system including a plurality of bases, a torque tube supported by the plurality of bases and configured to support a plurality of solar modules, and a drive device operably connected to the torque tube and arranged to translate the torque tube in a direction parallel to its longitudinal axis. The solar tracking system also includes a plurality of helical guides operably connected to the torque tube, and a plurality of cam assemblies, wherein upon linear movement of the torque tube, interaction between the helical guides and cam assemblies causes the torque tube to rotate about its linear axis.

A foldable adjustable photovoltaic module, comprising angle adjusting device, comprising adjusting component and basic photovoltaic panel on the adjusting component; and folding device, comprising first and second folding components, is provided. One end of the basic photovoltaic panel is installed with protective photovoltaic panel, and the first folding component is between the basic and the protective photovoltaic panels. Both sides of the basic and the protective photovoltaic panels are provided with side photovoltaic panels, and the second folding component connects the side photovoltaic panels, the basic photovoltaic panel and the protective photovoltaic panel. The module can control multiple photovoltaic panels for angle adjustment, so as to conveniently obtain the optimal illumination angle. Also, the foldable adjustable photovoltaic module controls folding of the photovoltaic panels, and reducing their contact area with the external environment in bad weather, so as to protect and prolong the lifetime of the photovoltaic panels.