Highway construction dust fall device

The invention relates to the technical field of expressway construction dust falling, and discloses an expressway construction dust falling device which comprises a base, a dust screen roller capable of automatically winding a dust screen is installed at the top of the base, a retracting and pulling roller capable of automatically rotating is installed at the top of the base, and a retracting and pulling head is annularly arranged on the outer side of the retracting and pulling roller. The top of the base is provided with shaking rollers capable of sliding up and down, the shaking rollers are located on the side, away from the dustproof net roller, of the drawing roller, the shaking rollers are divided into two sets, and a gap allowing a dustproof net to pass through is formed between the two sets of shaking rollers. According to the dust falling device for expressway construction, a dustproof net roll is connected to a dustproof net roller in a sleeving mode, then a dustproof net penetrates through a shaking