An optical fiber grating sensor-based coal mine underground safety comprehensive monitoring system comprising an aboveground part and an underground part. The aboveground part comprises an optical fiber grating static demodulator, a computer data processing system, a printer, a server, and a client. The underground part comprises a light switch array, a work surface safety monitoring subsystem, and a tunnel safety monitoring subsystem. Both of the monitoring subsystems at least comprise one monitoring base station. Each monitoring base station at least comprises one monitoring station. Each monitoring station corresponds to a set of optical fiber grating sensors. The monitoring system employs multiple monitoring stations, monitors multiple parameters underground, is integrated with the optical fiber grating sensors, employs all-optical measurement and optical fibers for signal transmission, is intrinsically safe, has a strong resistance against electromagnetic interferences, provides great monitoring effects, and implements real-time continuous long-term online monitoring and mining area-wide data sharing, thus improving guidance for safe production of coal, allowing for effectively reduced occurrence of coal mine safety incidents, and implementing safe and highly efficient production of coal.
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