Abstract: A real-time monitoring system for advanced detection of coal mine tunnels driven by shield tunneling machine is designed, which includes hardware, excitation mode and measurement mode. The resistivity distribution at each point inside the measuring area is obtained by using a three-dimensional (3D) electrical resistance tomography method, which realizes 3D electrical resistance tomography of the geological condition in front of the shield tunneling machine and provides a solution for shield tunneling machine to realize advanced detection in coal mine roadway.