Abstract: In order to overcome the problems of soil stratification, compression, migration, rheology and other large deformation in pipe soil coupling analysis, the traditional finite element analysis technology needs the help of new soil simulation and coupling methods. Among them, particle method (PM) based on pure Lagrangian and, discrete element method (DEM) based on meso discrete element theory are widely adopted because of their unique advantages in the field of large deformation of soil. Aiming at the most common geological disasters and the third-party disturbance along the pipeline, smoothed particle hydrodynamics (SPH) was used to analyze the stress and deformation characteristics of the pipeline under the large deformation of soil landslide and the erosion of viscous debris flow. The dynamic response rules of the pipeline under the impact of near-field explosion in soil were obtained. The cavitation, soil spalling, compression and other phenomena in explosive soil were accurately simulated, the particle flow software (PFC) and the three-dimensional finite difference program (FLAC 3D) of the discrete element method are combined to reproduce the soil movement process under a multi-shovel excavation, and the load accumulation effect of the pipe body is obtained. Many practices show that the particle method represented by SPH and the discrete element method represented by PFC can better solve the nonlinear large deformation problem of soil in the pipe soil coupling analysis. The fluid dynamics method is introduced to achieve the purpose of diversification of soil deformation research methods, which lays a foundation for further research on the coupling response mechanism of multi physical fields in soil.