Abstract: In order to improve the source location precision of mine microseismic monitoring system, considering the actual situation of the mine, high precision microseismic monitoring system in coal mine is developed. The substations of the system are laid in the mining area floor, collecting vibration wave signal. And then the substations transmit microseismic data to the center by the network. In order to guarantee the time accuracy of microseismic data of the substations, PTP precision clock synchronization protocol can be achieved. To improve the reliability and stability of the system clock, the RTC(Real Time Clock) was designed as a complement to the PTP clock. Based on the characteristics analysis of the vibration wave threshold value, the window of time and triggering number, microseismic wave is identified automatically. The center measuring and controlling computer manages every substation by remote control，monitoring working condition of every substation.The system is based on the statistical analysis of every coal mine microseismic events in time, numbers, location, magnitude, the future seismic trend prediction. The operation of this system shows that the monitoring results are fully identical with the actual situation; and the results have high accuracy positioning.