The phenomenon of sharing corridor resources between AC overhead transmission lines and buried steel pipelines is becoming more and more frequent, and the resistance coupling voltage generated by short-term high current of lines will seriously accelerate the corrosion of pipelines. In order to quantitatively calculate the resistive coupling voltage of buried pipeline, a calculation method based on CDEGS simulation model is proposed in this paper. Firstly, the simulation model of large current entering the ground is established. Secondly, the calculation method of resistive coupling voltage of pipeline when power frequency current grounding is given, and the influence of current amplitude, soil resistivity and the distance between the nearest point of current entering and the pipeline on the resistance coupling voltage is analyzed. Finally, the calculation method of resistive coupling voltage taking into account frequency and time-frequency conversion are given when lightning flows into the ground. The calculation method of maximum exchange voltage is given, and the influence of lightning current amplitude, distance from the nearest point of the pipeline, soil resistivity and of lighting flow into ground through multiple towers on the resistance coupling voltage is analyzed.