In order to reduce the dust density of the working face, eliminate the harm of dust explosion, and reduce the harm of dust on the respiratory system of the working face personnel, the dust reduction measures of spraying water spray in the working face are adopted to reduce the dust concentration to the safe range. Through the determination of dust concentration in the calibration position of the working face before and after dustfall, the results show that before dustfall, with the increase of the working face distance, the distribution of dust increases first and then decreases sharply and then increases slowly and then decreases slowly. The former peak is higher than the latter peak, and the maximum is 1200 mg/m3. After taking dust reduction measures, the total dust reduction rate can reach 74%, and the dust reduction effect is good.