Abstract: Through the analysis of smooth blasting principle and the calculation of its parameters, combining with the technology research and application at Ji₁₅-24080 machine lane of No.10 coal mine in Pingmei Shares, the paper concludes that smooth blasting can make the tunnel forming regular, eliminate stress concentration in surrounding rock outburst points, keep the rock's own strength, and be larger to reduce over break volume of the excavation, also can effectively eliminate the surrounding rock uneven and reduce the ventilation resistance，accumulation of gas and material consumption. All these reduce the cost and accelerate tunneling progress.