The utility model relates to a dust collector technical field is a portable car that gathers dust of self -pressure type, including bottom plate and box, fixed mounting has the box on the bottom plate, is equipped with dust import pipe on the box, and dust import pipe lower extreme both sides are equipped with left baffle and the right baffle that is to slope the form respectively, and left baffleother end fixed mounting has the vertical baffle that has a determining deviation with the bottom half, and upper end fixed mounting there is the storehouse of filtration in the box left side and islinked together with the box, and fixed mounting has the sack in the filtration storehouse, filters the storehouse upper end and is equipped with smoke purifying outlet, and the bottom half is equipped with the ash -valve. The utility model has the advantages of reasonable and compact structure, convenient to use combines together the whitewashed cloud of dust gas process multichannel baffle dustfall and final purification of dust removal sack of self taking the pressure, the utility model discloses required sack is few, sack clearance, change convenience, the box design is compact, need notpower drive, and the dust collection efficiency is high, and the secondary pollution who causes is avoided letting alone to discharge by effectual collection dust.