The utility model discloses a dust removal device under a mine, and relates to the technical field of dust removal equipment in the mine. The device comprises a dry-type
dust collector which is arranged in a mine, an air outlet of the dry-type
dust collector is located at an air outlet of the mine, an air inlet of the dry-type
dust collector is connected with an air
pipe, a hanging bracket is installed at the free end of the air
pipe, the two ends of the hanging bracket are respectively provided with a back
shore supporting foot, the hanging bracket is provided with two sections, and the two sections of the hanging bracket are connected through a telescopic
assembly. And one end of the supporting arm
assembly is rotationally connected with the hanging bracket, the other end of the supporting arm
assembly is rotationally connected with a
positive pressure fan, and an air outlet of the
positive pressure fan corresponds to an air inlet of the air
pipe. According to the utility model, the two telescopically connected hanging brackets are connected through the telescopic assembly, so that the length can be adjusted according to the
caliber change of different areas of a mine; the supporting arm assembly moves to the side far away from the air pipe, dust is blown to the air pipe, the dust removal rate is increased, and the air quality in a mine and the
operation safety of miners are guaranteed.