Abstract: The correlation between the failure internal pressure of the X80 pipeline containing corrosion defects and parameters such as the depth, length, and width of corrosion defects under the influence of bending moment was studied using nonlinear finite element method, and corresponding prediction methods for failure internal pressure were provided. The results show that bending moment, depth, length and width of corrosion defects all had effects on the failure internal pressure of high-grade pipelines containing corrosion defects. The prediction method for failure internal pressure of high-grade pipelines containing corrosion defects under the influence of bending moment could accurately predict the failure internal pressure of pipelines, which had guiding significance for practical engineering.