Abstract: On the basis of mastering the mechanism of hydraulic fracture technology in preventing rock burst, water pressure required by the fracture is obtained through the application of RFPA numerical simulation software by taking fully mechanized caving face of New Julong 1302N as engineering background, meanwhile, according to the system of real time monitoring and measuring early warning of mine pressure, the relationship among the hydraulic fracture parameters is obtained, and thus specific parameters of hydraulic fracture are determined. We use the method of drilling bits and microseism to monitor the impact prevention effect. The monitored result shows that an amount of drillings of coal dust is far below a limit amount of coal dust which causes impact risk after hydraulic fracture, wherein microseism events are significantly reduced, the frequency is lower and fluctuation is relatively very small. The results of this experiment show that hydraulic fracture can effectively reduce the rock burst monitoring.