Abstract: This paper analyzed the main problems existing in the structure and application of the monitoring system of coal mine safety,and put forward the solution of fully digital transmission of the monitoring system.The function of monitoring sub-station,the working process of the disconnection and multi-system integration were redefined in the whole digital transmission system,which made the realization of multi-network fusion and the linkage between systems in the coal mine safety monitoring system easy and feasible.It can provide a new way for information sharing and collaborative processing in coal mines.