Dust collection type drilling machine for coal mine

Disclosed is a dust collection type drilling machine for coal mines. The device comprises an electric coal drill, a canvas telescopic air pipe, a first connecting pipe, a first gas collecting bottle,a water tank, a second connecting pipe and a second gas collecting bottle, a drill bit at the right end of a drill rod of the electric coal drill horizontally drills towards a coal wall; the canvas telescopic air pipe is sleeved outside a drill rod of the electric coal drill; the lower side part of the right end of the canvas telescopic air pipe is connected with an air inlet of a first connectingpipe; a gas outlet of the first connecting pipe is connected with a first gas collecting bottle; a first switch valve is arranged on the first connecting pipe; the first gas collecting bottle is vertically inserted into the water tank, a through hole is formed in the side wall of the first gas collecting bottle, the top of the first gas collecting bottle is connected with a gas inlet of the second connecting pipe, a gas o