Abstract: In order to play back the operation process of the coal mine monitoring system in the laboratory, analyze the problems in the field system, and simulate the field environment for system debugging, a data playback system is established based on coal mine safety monitoring system. Through the real-time storage of raw data from underground hardware equipment, the original data in a certain period of time are selected for data input, processing and playback rehearsal of the monitoring system, which can effectively find out various problems existing in the monitoring system.