Turnover material box for protecting cross beam

The utility model discloses a turnover material box for protecting a cross beam, which relates to the technical field of protection boxes, and comprises a tray, an inner coaming and a top cover, the tray is provided with an inner slot, the inner coaming is inserted into the inner slot, and the top cover covers the inner coaming; an outer coaming is arranged on the outer side of the inner coaming, a first sliding guide rail is arranged on the first inner wall of the inner coaming, a plurality of first rollers are arranged on the first sliding guide rail, a second sliding guide rail is arranged on the second inner wall of the inner coaming, a plurality of second rollers are arranged on the second sliding guide rail, and the first rollers and the second rollers are connected with a cloth bag. And the cloth bag is divided into a plurality of areas for storing the cross beams by a plurality of EVA foam plates. The EVA foam plates divide the cloth bag into a plurality of areas for storing the cross beams, so that a