Foldable vehicle-mounted photovoltaic power generation device

The invention discloses a foldable vehicle-mounted photovoltaic power generation device, and relates to the technical field of photovoltaic devices. The photovoltaic power generation system comprises a plurality of photovoltaic power generation panel groups which are hinged in sequence, wherein any photovoltaic power generation panel group comprises two photovoltaic power generation panels which are connected in a hinged manner; at least two sliding rods are arranged right above the photovoltaic power generation panel group; the two photovoltaic power generation panel sets are connected through two connecting pieces, each connecting piece comprises a U-shaped hinged support, a pair of hinged shafts are arranged on each U-shaped hinged support, and a sliding ring sliding in the length direction of a sliding rod is arranged on the side face of the outer bottom of each U-shaped hinged support; the two photovoltaic power generation panels located at the two ends are each connected with a connecting piece. The two