Abstract: In the course of mine tunnel construction, the advance geological prediction is an important means to reduce geological disasters.The detection principle and method of TRT system are introduced, and the application prospect of TRT advanced geological forecast system in metal mine laneway is discussed.Taking the construction of the tunnel in Xulou iron mine as an example, combining with the drawing method of the palm surface and the geological data of the mining area, TRT advance detection and interpretation were carried out for the two mine levels of -205 m and -217 m respectively.Through the inspection of the detection results of the two roadways, the accuracy of the forecast was 70.0% and 68.2% respectively.The forecasting system of TRT has a good forecast effect on the joint fractures, soft alteration zones, karst caves and ore bodies in the roadway of metal mines, which can provide important basis for the development of roadway construction plans and safety measures, and significantly improve the progress of roadway construction.