Cable tray shield is a kind of used for power or communications cable line of cable bridge frame cover, by plate glass, the top surface of the cable tray cover and the hem on both sides of the top surface is concave and convex surface shape, convex and concave on the surface of the top and set up in a row, the two ends of the each unit of convex and concave curve to the same direction as folding, the elevation difference between the convex and concave surface is less than 8 mm, high strength and structure of the utility model of cable tray cover, due to the cover and the concave and convex shape of the structure plane model, thus increasing the rigidity of the shield stiffness, due to the strength, rigidity can use thinner materials, such as using the same thickness more than doubled on its strength, its advantages mainly is to reduce the cost, the product is out of shape not easily.