Underground mine emergency communication system

The invention discloses an underground mine emergency communication system, relates to the field of underground mine emergency communication, and realizes the functions of performing emergency system communication signal transmission by using an existing underground power supply line in an underground mine, alarming aiming at different risk sources and guiding an evacuation route. The function of real-time emergency alarm for workers on the working face of the production line is realized; comprising an emergency system master station which is used for establishing connection with a ground system server and establishing connection with an underground emergency system substation; the emergency system substation is arranged in an underground emergency display area and can perform system transmission communication with the production surface main node through an underground power line; the voltage conversion relay terminal is in system communication with the emergency system substation through a built power line