Roof photovoltaic power generation device

The roof photovoltaic power generation device comprises a protective shell, two movable plates are arranged at the position, close to the top, of an inner cavity of the protective shell, circular shafts are installed on the two movable plates in a penetrating mode, and the two ends of each circular shaft penetrate through the front side wall and the rear side wall of the protective shell respectively and are fixedly connected with side blocks. The two ends of the circular shaft are movably connected with the front side wall and the rear side wall of the protective shell correspondingly, springs sleeve the positions, close to the front end and the rear end, of the outer side of the circular shaft correspondingly, the driving motor drives the threaded rod to rotate, the threaded rod drives the push rod at the top of the threaded sleeve to push the connecting plate upwards, the connecting plate pushes the photovoltaic panel on the L-shaped frame out of the protective shell, and photovoltaic power generation is n