Aiming at the problem of the proximity of transmission lines and buried pipelines in cities, through the establishment of a line-tower-grounding-buried pipeline integrated model, comprehensive consideration is given to the process that the shunt of adjacent towers and lightning conductors and the fault current entering the ground via the tower grounding grid. Based on this model, the effect laws of soil resistivity, proximity distance, pipeline parameters, crossover angles, and different current supply methods on the potential of metal pipelines and corrosion resistance voltage are studied. Research on the suppression method of pipeline potential rise can also be carried out for transmission lines, which provides guidance on the safety protection of adjacent fuel (gas) pipelines when a ground short circuit fault occurs.