To investigate different influencing characteristics of local scour around submarine pipeline, hydrodynamic and sediment transport modules based on Flow-3D are used to numerically simulate the local scour around the pipeline. RNG k-ε turbulence model is used to simulate the turbulent flow field around the pipeline. The instantaneous shear stress of the bed surface is taken as the starting and transporting condition of sediment. The simulation results of the equilibrium scour depth and terrain around the pipeline are verified with the previous experimental results which shows good agreement. Then, the numerical simulation method is applied to investigate local scour process around pipeline during the scour process of pipelines. The results show that the local scour processes are includedclearance scour, wake scour and equilibrium scour. The velocity, sediment grain size, pipeline diameter, initial gap between pipeline and seabed and the pipelines distance affects submarine pipeline equilibrium scour depth and terrain in varying degrees.