In order to solve the problem of poor dust suppression effect of airborne external spray dust suppression system in the driving face of the 31 coal mine auxiliary transportation mountain half coal rock roadway in Daliuta Mine, which can not adapt to the coal dust and rock dust control during the tunneling process, based on the coal dust and rock dust samples collected at the working face site, an experimental study on the dust wetting characteristics of the composite surfactant was carried out, and the best surfactant composite scheme and proportion were obtained. Through the composite surfactant spray dust suppression test and the tunneling simulation test, the best spray pressure test of the roadway was carried out to verify the dust suppression efficiency improvement effect of the spray dust suppression system after adding the composite surfactant on the coal dust and rock dust samples collected at the working face, and the best spray pressure was determined Parameters. The field application results show that the dust concentration in the coal and rock mass excavation process of the working face is effectively reduced after adding the compound surfactant to the water used in the spray system of the working face, and the dust concentration at the driver's position and the 15m position at the downwind side is 486.27 mg/m3and 279.33 mg/m3Reduced to 180.20 mg/m3and 116.80 mg/m3. In the process of tunneling, the total dust reduction efficiency of coal dust reached 62.94% and 58.19%, respectively.