In order to study the erosion extent of mixing element caused by solid particle in SK-static mixer,the erosion and flow field model was established by using solid-liquid two-phase flow and computational fluid dynamic method.Particle track and erosion on the static element caused by particle in the SK-static mixer were analyzed through fluid dynamic module in Ansys Workbench.The results show that erosion caused by particle mainly occurs at the helix edges of the elements,and the erosion rate density reaches the maximum at the three fifth of total element.Erosion rate density is also serious near the inlet and middle part of total elements.Averaged particle diameter and particle speed are the key factors influencing the erosion process apart from impact angle.The erosion is more serious with certain combination of particle diameter,impact velocity and volume fraction.The phenomenon of particle erosion is the result of comprehensive effecting of particle physical property and flow field features.