Abstract: Fangshan coal mine is taken as the engineering background to study the accurate scope of the pressure relief drilling in front of the working face and make the coal mine dynamic disaster prevention and control measures be more economical.By analyzing the space distribution of micro-seismic event based on the high-precision micro-seismic monitoring technology, the distribution law of abutment pressure in front of the working face has been studied.Pressure relief drilling parameters are redesigned according to the above result.The results show that the micro-seismic monitoring technology can be used to obtain the scope of advanced abutment pressure, and then guiding the implementation of large diameter pressure relief drilling, the method has strong engineering application value, and can improve the economical efficiency of dynamic disaster prevention.