Aimed at the failure problem caused by the erosion wear of solid particles in the fluid during the pipeline transportation,CFD-DPM model was used to analyze the influence of different flow rates,particle diameters,sand volume ratio and included angle of different-surface pipes on erosion wear performance of tee in different planes.The results show that the bend at the junction of the three pipes is the location where the pipes mainly undergo erosion wear,and the upper pipe wall of the horizontal two-pipe elbow is the most severely damaged location.When the flow rate is 2 m/s to 10 m/s,the volume ratio of sand is 1% to 9%,the angle of tee in different planes is 90° to 150°,and the particle diameter is 0.1 mm to 0.5 mm,the maximum erosion rate of the pipeline increases exponentially as the flow rate increases,and the erosion area is significantly expanded.At low flow rates,the sand volume ratio has a little impact on the maximum erosion rate,while at high flow rates,the maximum erosion rate has a linear positive correlation with the sand volume ratio.The increase of the angle of tee in different planes reduces the flow restriction of the pipes to solid particles,and the erosion rate decreases linearly.The maximum erosion rate shows a gentle upward trend with the increase of particle diameter,and the erosion damage caused by large particles is more concentrated compared with small particles.