The invention discloses a photovoltaic panel assembly of a folding solar photovoltaic power generation mechanism for automobiles, mainly comprising bottom fixed plates, hinge assemblies, folding racks, a first photovoltaic panel assembly, a second photovoltaic panel assembly and a third photovoltaic panel assembly. The two ends of each bottom fixed plate are each provided with a fixed screw hole and a square hole, the square hole is used for facilitating fixation of a slider screw, and the fixed screw hole is used for fixing a photovoltaic panel assembly to a slider. Hinges are used for connecting two adjacent photovoltaic panel folding racks to make the two adjacent photovoltaic panels folded, and the two adjacent photovoltaic panels can rotate 360 degrees. The photovoltaic panels are of a large power generation area, and are small after folding. The photovoltaic panel assembly has a simple structure, is beautiful in shape and convenient to mount and dismount, and can be widely used as a folding photovoltaic panel power generation mechanism for automobiles.