The invention relates to a solar power generation device capable of protection. The solar power generation device comprises a pedestal, a rotatable chassis arranged on the pedestal, a solar panel, a support mechanism and a protection mechanism; the support mechanism comprises two portal frames arranged in symmetry, a rotating shaft penetrated between the portal frames, a support plate for fixing the solar panel, a support plate driving assembly and a portal frame driving assembly; and the protection mechanism comprises a protective curtain box, a hook assembly and two door-shaped frames, the protective curtain box and the hook assembly are arranged at the lateral sides, opposite to each other, of the pedestal, the protective curtain box is internally provided with a roller shutter shaft, a protective curtain is arranged on the roller shutter shaft in a rolled manner, and the outmost end of the protective curtain is provided with a hanging ring which can be connected with the hook assembly. The solar panel of the solar power generation device can be adjusted in the rotation and pitching manner according to the height and direction change of the sun, and the power generation device is provided with the protection mechanism, so that the power generation device can be protected effective in hail or strong wind weather.