A multifunctional dust collector capable of clearing hair slag comprises a rubber brush, a hair suction barrel, a volute, a fan blade, a motor, a power plug connector, a back case, a handle, a hair storage chamber, a filter net and a hair storage chamber back cover, wherein the rubber brush is installed in the middle of an oblate air suction port. After the collector is powered on, the hair slag, hair, air with dust enter the hair suction barrel from the hair suction port under the cleaning of the rubber brush and then are thrown into the hair storage chamber under the centrifugal effect of the blade, and under the blockage of the filter net, the hair slag, the hair and the dust are left in the hair storage chamber while the air is exhausted,.