Abstract: In order to solve the problem of the whole mine or large area communication failure caused by the fault of the core communication equipment in the traditional coal mine double hot-standby system, this paper introduces the system structure and working process of double hot-standby in traditional coal mine safety monitoring system, and proposes a system optimization scheme by using redundant core communication equipment integrating into double hot-standby system, and explains the use method and precautions. The practical application verifies that this optimization scheme can effectively avoid the communication failure in the monitoring system.