Tunnel excavation safety protection system

The invention relates to the technical field of tunnel excavation, and discloses a tunnel excavation safety protection system which comprises a terminal server used for remotely accessing a monitoring module and monitoring the state of mechanical equipment in real time, a network switch 1, a network switch 2 and a network switch N used for ground and in-tunnel data transceiving communication, and an access control system. A worker wears positioning safety helmets in advance, issues identification cards and working communication equipment, establishes a plurality of base stations in advance according to actual geographic positions, is connected with a central controller through the base stations and then is connected with a terminal server to realize combination of software and hardware, and a personnel positioning system and a real-time monitoring module are formed and used for monitoring the working environment in a tunnel. Monitoring data are transmitted to the central controller in real time, and processed