Solar power generation device capable of adjusting light receiving area

A solar power generation device capable of adjusting a light receiving area disclosed by the invention comprises a mounting rack and a protection mechanism. The protection mechanism comprises a protection plate and a rotating mechanism, the rotating mechanism comprises a connecting rod, two sides of the lower part of the mounting rack are provided with bases, the upper surface of each base is symmetrically and fixedly connected with two mounting rods, and the mounting rods are provided with chutes. A round rod is slidably connected into an inner cavity of each chute in a penetrating mode, a connecting block is fixedly connected to one end of the round rod in a penetrating mode, a first rotating shaft is fixedly connected to the connecting block, a second rotating shaft is arranged on one side of the first rotating shaft, and one end of the second rotating shaft is fixedly connected with the bottom of the connecting rod in a penetrating mode. According to the invention, the protection plate is moved to drive t