Abstract: According to the dust pollution problems of the dry drilling in the underground mine, a new mine dust collector of the borehole collar with an integration 0 f intrinsic safe, light weight and small type was studied.Based on the experiment analysis and study on the main factors affected to the dust collection effect, a systemat ic study was conducted on the key power element-pneumatic ejector.A lab experiment and industrial experiment was conducted on the main performances of the dust C ollector.The experiment results showed that the total dust collection efficiency of the dust collector could reach at 99.1 % and 98.6% individually. The dust collection effici ency of the respirable dust could reach at 94. 1% and 93.2% individually.The mine safety production could effectively protected.