The utility model provides an absorbent brush device for dust catcher, when mention the dust absorption pole or change dust absorption pole and ground interfacial the institute during angularity, theabsorbent brush rear wheel can not mentioned and breaks away from ground along with the dust absorption pole together, the rear wheel guarantees still attached to subaerial that dust absorption in -process absorbent brush bottom plate and ground remain the horizontality throughout, keeps the biggest work contact surface, the dust absorption is efficient. Simultaneously, the rear wheel in the dustabsorption journey, can rely on the roll of rear wheel easily to remove the absorbent brush all the time attached to subaerial always, reduces cleanness person's intensity of labour.