Abstract: Aiming at the existing problems of coal mine monitoring system in process of information transmission at present,the paper put forward a scheme of using technology of networked virtual instrument and CAN bus to improve the system.The improved coal mine monitoring system transmitted moni-toring information to detection server by CAN intelligent detection node and CAN interface card,and built up virtual instrument system by LabVIEW in order to analyze and process the monitoring data.The system realized sharing of monitoring information and feedback and transmitting of control information.