The invention relates to a screen sunshade which comprises a first sunshade plate, a second sunshade plate, a third sunshade plate and a rotation shaft. The first sunshade plate comprises two first shaft holes, wherein the two first shaft holes are arranged in the opposite two sides of the first sunshade plate respectively. The second sunshade plate comprises two second shaft holes, wherein the two second shaft holes are arranged in the opposite two sides of the second sunshade plate, and the second shaft hole in one side of the second sunshade plate is aligned with the first shaft hole. The third sunshade plate comprises a third shaft hole, wherein the third shaft hole is arranged in one side of the third sunshade plate, and the third shaft hole is aligned with the second shaft hole in the other side of the second sunshade plate. The rotation shaft is detachably arranged in the aligned first shaft hole and the second shaft hole as well as the aligned second shaft hole and the third shaft hole. The first sunshade plate, the second sunshade plate and the third sunshade plate are used for encircling the top side and two sides of a display device.