Protective device for road and bridge engineering

The utility model relates to a protective device used for road and bridge engineering, which comprises a base used for being fixed with the ground. The sound absorption assembly is arranged on the base and comprises a protection plate, the lower end of the protection plate is fixed to the base, and a sound absorption cotton plate is fixed to the inner side of the protection plate; the buffer assembly is arranged on the outer side of the protection plate and comprises a plurality of sets of buffer pieces arranged in the direction perpendicular to the protection plate, each set of buffer piece comprises two fixing rods arranged at the two ends of the base respectively, and a plurality of elastic bands are connected between the two fixing rods so that a buffer face can be formed. The buffering faces of the multiple sets of buffering pieces are sequentially shrunk from outside to inside. The protection device for the road and bridge engineering is simple in structure, a sound insulation structure is arranged insi