The utility model provides a dust absorption position instantaneous high pressure can be given, the inside pollutant suction of porous bituminous paving is forced, the effectual big negative pressure dust absorption equipment of porous bituminous paving of suction, the scheme is, including the inside fixed axle that has the cavity, the fixed axle lower part is equipped with the air channel that is linked together rather than the cavity, suit and the gapped roller of fixed axle rotate on the fixed axle, the roller on by the sleeve of inside and sleeve excircle the packing element of parcel constitute, the disc is the smooth surface in the sleeve, there are a plurality of dust absorption grooves to sleeve radially penetrating through along its circumference interval arrangement on the roller, the fixed axle is equipped with outward around the sealing strip of its air channel, sealing strip and the interior inseparable sliding fit of disc of roller, constitute and to rotate air channel lower part sealing strip when corresponding when one of them dust absorption groove and block the air channel, the structure that clearance between dust absorption groove and fixed axle and the roller is linked together, the air channel intercommunication has the pressure valve of setting at the fixed axle tip.