The solid particles in the oil may cause erosion wear on the wall of pipeline in the process of oil transportation.DPM erosion model was used to predict the erosion area on the tee in different planes by changing the inlet velocity,particle diameter and particle mass flow rate.The results show that the erosion wear of tee in different planes is mainly concentrated on the curved surface in the junction of three pipes,the upper wall of the horizontal pipes and the junction of two horizontal pipes,while the erosion wear on the bottom of pipe bend is smaller.As the inlet velocity increasing,the maximum erosion rate of pipe is increased exponentially.The maximum erosion rate of pipe is firstly increased slowly with the increasing of particle diameter,then increased linearly when the particle diameter is increased to a certain value.With the increase of particle mass flow rate,the maximum erosion rate of pipe is increased linearly.