A large amount of data from the microseismic monitoring system in Huize lead-zin c mine was analyzed,then in-depth study on the major parameters of microseismic events was made by the software come with the system.It was found that there wer e power law distribution characteristics between microseismic magnitude and freq uence,microseismic energy and moment,and the apparent stress of rock and microse ismic moment.At the same time,based on rock destabilization events occurred in m ajor underground monitoring areas,the changes of the premonition of rock destabi lization,the event frequency and the accumulated apparent volume depending on ti me were analyzed. It was found that before rock destabilization occurred the maj or microseismic monitoring parameters showed abnormal changes.It can fully meet requirements of prediction and forecast to use the changing signs of these param eters to study the threshold time of rock destabilization.