Highway maintenance device capable of reducing noise

The utility model discloses an expressway maintenance device for reducing noise, which comprises a base, a connecting piece, a support frame, a polyester plate, an acrylic plate, a connecting block, a connecting assembly, an adjusting knob, a nesting block, a second bevel gear and an adjusting shaft, the inner surface of the base is nested with the connecting piece, and the end part of the upper surface of the connecting piece is provided with the support frame; according to the expressway maintenance device capable of reducing noise, the base facilitating supporting is arranged, the base is attached to the expressway pavement and matched with the supporting frame assembled through the connecting piece, the symmetrical polyester plates are embedded in the supporting frame, and then the acrylic plates are embedded in the middle ends of the base and the supporting frame; and by matching with the gap between the polyester plate and the acrylic plate and the mute hole formed in the lower part of the acrylic plate