The invention discloses an earthquake tunnel geological detection prediction method and a relative device, which uses one earthquake sensor to measure the vibration strength signal generated by explosion, arranges two couples of non-polarized electrodes vertical with each other to measure the geo-electric signal generated by explosion, and/or using a coil to measure the electromagnetic signal generated by explosion. The invention uses the earthquake sensor, non-polarized electrodes and coil to receive the vibration strength signal, geo-electric signal and/or electromagnetic signal in the front, middle and later steps of explosion, arranges the two non-polarized electrode couples vertical with each other to measure the geo-electric signal generated by explosion, selects the large geo-electric signal as the parameters to recognize target geological disaster recognition. The invention normalizes the geo-electric signal and/or electromagnetic signal according to the vibration signal, usesthe normalized geo-electric signal and/or electromagnetic signal as detection prediction parameters to be compared with the detection prediction parameter range of multiple target models, and uses the matched parameter range to recognize the grades of the target geological disaster prediction.