To study the erosion wear of shale gas fracture on double elbows bend,based on liquidsolid twophase flow dynamics and erosion theory,the double elbows erosion wear model was established.The effect of the typical working conditions and the structure parameters of the double elbows bend pipe on the erosion rate of double elbows bend was studied.The results show that the maximum erosion rate of double elbows bend occurs in the bottom half of the inner wall of the first elbow outer arch that the fracturing fluid flows through at first,the erosion area of the second bend is moved forward and increased.The maximum erosion rates of double elbows bend are all increased with the increasing of the fracturing fluid velocity and the increasing of the volume fraction of the particles,and all decreased with the increasing of the particle size of supporting agent and the increasing of the curvature radius of elbows with double elbows.There exists the maximum erosion rate of double elbows bend when the upper and lower bend of the double elbows bend assembly angle is 20 degrees to 40 degrees.