Abstract: The bolt-net supporting in the roadway has a great influence on the results of the mine transient electromagnetic detection. To study the interference response mechanism caused by the bolt-net supporting during construction, the mine transient electromagnetic response characteristics at different detection distances under the bolt-net supporting were simulated based on COMSOL software, and the influence laws were analyzed. Combined with the relevant downhole test, the interference characteristics of bolt-net supporting to mine transient electromagnetic in different detection directions were studied. Finally, the original data of mine transient electromagnetic under mine was corrected by the polynomial fitting function. The research showed that the accepted secondary induction potential value increased obviously under the influence of the bolt-net supporting, and the influence degree of interference was inversely related to the distance of the wire frame with a certain range, and the interference response is the greatest when the detection wire frame plane is positive to the metal body. The correction method can well restore the true resistivity distribution characteristics and improve the interpretation accuracy.