Protective device for asphalt road construction

The utility model discloses a protective device for asphalt road construction, and relates to the technical field of road protective guards. The noise barrier comprises a suction fan and a plurality of noise barrier hollow plates, a mounting hole is formed in one side surface of the sound barrier hollow plate; the other side surface of the sound barrier hollow plate fixedly communicates with a connecting pipe; the sound barrier hollow plates are connected through matching of connecting pipes and mounting holes, the mounting hole of one sound barrier hollow plate is connected with a filter boxthrough matching of a connecting pipe, the mounting hole in one side face of the filter box is connected with a purification box through matching of a connecting pipe, and one side face of the purification box is connected with an air suction port of a suction fan through an air pipe. Through the design of the sound barrier hollow plate, the filter box, the purification box, the mounting hole, theconnecting pipe, the suct