Abstract: In order to solve the problem of gas and dust overrun of the porous coal seam during the drilling period, the fusion concept of collection type blowout preventer and jet pump dust-removal technology is proposed. Air and water jet dust collector is included in spray and aspirating type air-dust separation box. Air and water jet dust collector is used to produce the negative pressure, high speed fog flow, and improve the gas collection capacity and efficiency of dust removal of air-dust separation box. In this way, a common type drilling protection device with the function of blowout preventer and dust removal is developed, which effectively guarantees the safety of the drill.