Corrosion is an important factor that endangers pipeline performance and affects transportation safety.The finite element software was used to establish complex rectangular and circular corrosion defect pipeline models,and the model was verified by full-scale blasting test data.The effects of length ratio,width ratio and depth ratio of complex rectangular corrosion defects and radius and depth of complex circular corrosion defects on pipeline failure behavior were analyzed.Based on the numerical analysis results,the pipeline integrity was comprehensively evaluated.The results show that the model error is 4.2% to 4.6%,which is lower than the experimental error;the stress of the two types of complex corrosion defects is symmetrically distributed,and the circumferential stress is greater than the axial stress;the depth ratio of complex rectangular corrosion defects has the greatest influence on the failure pressure,and the width ratio is the smallest;when the length ratio reaches 0.5,the pipeline failure pressure is stable at 9.5 MPa;the shallow corrosion depth of complex circular corrosion defects has more obvious influence on pipeline performance;the axial force has little effect on the failure pressure of the pipeline.