Abstract: In order to further improve the positioning accuracy of the microseismic monitoring system, a microseismic monitoring system based on wave velocity inversion is proposed and designed.Through the self-excited seismic source with adjustable frequency and controllable excitation force, the inversion and correction of the wave velocity field before microseismic location is realized, and then the corrected wave velocity field is used to locate the microseismic event caused by coal and rock mass rupture.The paper briefly introduces the system composition, design of substations, sensors, self-excited seismic source and wave velocity inversion algorithm.The conclusions of the comparative test of fixed-point blasting in underground coal mines show that the three-direction positioning errors of the microseismic monitoring system based on wave speed inversion are all less than 10 m, and are better than Polish ARAMIS and Canadian ESG microseismic monitoring systems.It provides new ideas and implementation schemes for further improving the positioning accuracy of the microseismic system.