Dust removal device of mine down-the-hole drill

The utility model belongs to the technical field of mining machinery, and discloses a dust removal device of a mine down-the-hole drill, which comprises a conical pipe and an annular base, the conical pipe is arranged on the upper surface of the annular base, a plurality of groups of positioning triangular cones are arranged on the lower surface of the annular base, and the plurality of groups of positioning triangular cones are inserted into the ground. The conical pipe and the annular base are both located at the outer end of the drill rod, a limiting mechanism for limiting the floating range of dust in the conical pipe is arranged on the upper surface of the conical pipe, the inner wall of the limiting mechanism is attached to the outer surface of the drill rod, an exhaust hole is formed in the outer surface of the conical pipe, and a collecting mechanism is installed in the exhaust hole of the conical pipe. And the connecting position of the conical pipe and the drilling machine is blocked through the lim