Abstract: Directional drilling crossing technology has become the preferred solution for oil and gas pipelines to cross obstacles due to its minimal damage to the surface. However, such pipelines often face challenges including complex soil environments, vulnerable anti-corrosion coatings, and difficulty in detection, making it hard to effectively evaluate the cathodic protection level. Taking three directional drilling crossing sections (Xicheng Canal, Baiqugang, and Yuanhetang) of the West-East Gas Transmission Pipeline First Line as the research objects, this study obtained key parameters such as the cathodic protection potential distribution and anti-corrosion coating surface resistivity through on-site tests. A numerical model was established using BEASY software combined with the GID modeling module to simulate the pipeline potential attenuation characteristics under different cathodic protection potential distributions and anti-corrosion coating conditions, thereby evaluating the corrosion risk of the crossing sections. The research proposed the cathodic protection potential control requirements for directional drilling crossing sections, providing technical references for the design, evaluation, and optimization of cathodic protection for similar pipelines.