Abstract: Based on on-site examples and CDEGS electromagnetic interference simulation software, a simple model was established to explore the impact of different influencing factors on pipeline AC interference. The results indicated that the influence of parallel length on AC interference varied at different relative positions. As the parallel spacing decreased, the load current, the imbalance of load current, and the resistivity of the outer layer of the seabed cable increasd, and the AC interference of the pipeline increased. By establishing a simple model, the influence of the resistivity of the outer layer of the seabed cable on electromagnetic interference was further explored. The results showed that as the resistivity of the outer layer increased, the resistive coupling effect of the seabed cable would be enhanced, and the interference voltage generated on the pipeline would increase.