In this paper, for the problems of underground cable positioning and via reconstruction, an imaging method based on broadband electromagnetic scattering field data is proposed to reconstruct the underground cable path image. By analyzing the propagation principle of broadband pulse signals in different media, the scattered field data containing information of electrical parameters of different media are obtained, and the state and the path direction of underground cables are reflected by normalized contrast parameter inversion imaging. Simulation results show that the proposed image reconstruction method can not only accurately detect the path trajectory of underground cables, but also image the cross-section of a certain section of cables, and realize the monitoring of the state of underground cables. The method in this paper combines the advantages of broadband narrow pulse magnetic field, scattered field imaging and multi-line observation technology to provide a new non-contact high-precision detection method for the path detection and image reconstruction of underground cables in complex situations.