Buried pipeline crossing fault and its surrounding soil are taken out together from the semi infinite medium into SHELL281 element and SOLID45 element for dispersing respectively. The pipeline is simulated as thin-walled hollow cylindrical structure and the soil is simulated as uniform entity medium. Established is the pipeline-soil nonlinear contact model on the premise of ensuring the calculation accuracy and according to the actual condition and state nonlinear theory so as to simulate slippage, separation and closure phenomenon between the pipeline and soil. Applied is the finite element method to analyze interaction between the pipeline and its surrounding soil, determine the effective calculation area of the model and then establish 3 dimensional multiple nonlinear finite element numerical calculation model used for buried pipeline crossing fault. Applied are the model and methods in codes, standards and specifications to calculate project cases respectively and compared are results obtained from calculation to prove the rationality and accuracy of the model.