Install the finished shoes on the finished shoe anti bending test machine, and use the finished shoe anti bending test machine to drive the tested finished shoe's bending part to repeatedly bend at a bending angle that matches its shoe type and a fixed speed of the bending machine. After reaching the predetermined time or completing the specified number of twists, observe the damage to the tested finished shoe's bending part, and evaluate the anti bending performance of the tested finished shoe based on the number of twists without damage or the severity of the damage to the finished shoe's bending part after completing the specified number of twists .