Plate girder buckling type sound barrier

The utility model belongs to the technical field of sound barriers, and particularly relates to a plate girder buckling type sound barrier. The plate-beam buckling type sound barrier comprises a cavity formed by a panel and a back plate and a sound absorber arranged in the cavity, the upper end and the lower end of the panel and the upper end and the lower end of the back plate are each provided with a lap joint edge formed through bending, a cross beam plate is buckled on the surfaces of the lap joint edges, and the cross section of the cross beam plate is in a trapezoid shape formed through bending and is attached to the bending shape of the end of the panel and the end of the back plate. Pressing rubber strips are transversely arranged on the two sides of the connecting plate, and the middle of the connecting plate is connected with the lap joint edge through a bolt or a riveting screw; the unit plates of the plate-girder buckling type sound barrier are easy to assemble and tightly connected with one anoth