Dust removal device

The invention provides a dust removal device which is characterized in that a suspender is connected with an anchor rod on a roadway roof and is provided with a slot; the telescopic rod is provided with a telescopic end and a fixed end which are oppositely arranged, and the telescopic end has an initial state and an extension state which are oppositely arranged; the first telescopic air duct is used for removing dust, the telescopic end is in driving connection with the first telescopic air duct, and when the telescopic end is switched between an initial state and an extension state, the telescopic end can drive the first telescopic air duct to stretch out and draw back; the first sliding device is provided with a first end and a second end which are oppositely arranged, the first end of the first sliding device is movably arranged in the open groove, the second end of the first sliding device is connected with the fixed end, and the fixed end moves relative to the hanging rod through the first sliding device