Abstract: For the actual status that the dust in underground working face drilling is difficult to control, we propose pneumatic orifice filter technology, and the principles of pneumatic orifice dust collector are introduced. Saving-energy experimental program is designed. To ensure compressed air parameters unchanged, we carried out ejecting performance test without cyclone no spray, without cyclone spray, with cyclone no spray and with cyclone spray four kinds of working conditions. We obtained the change of import static pressure, ejecting air flow, ejecting ratio, noise and water consumption with compressed air pressure. Dusting experiment showed that when the compressed air pressure was 0.3 MPa, and the dust removal efficiency of two different dust collector reached 97.6% and 98.5% respectively, and reflected in the good effect of dust removal.