With the development of mining equipment,the increase of mining quantity puts forward higher requirements for the performance of monorail crane,which is widely used in recent years.Taking the hydraulic circuit of monorail lifting as the research object,the influence of the damping hole on the motor starting of the hydraulic brake cylinder was analyzed.The mathematical model of the system was established,and the results were simulated in Simulink,then the simulation test was carried out by AMESim.The results show that setting a damping hole in the inlet road of the brake hydraulic cylinder has a delayed effect on the start of the motor,which can make the motor start quickly when it has a large enough start torque and prevent the motor start torque from being insufficient due to the rapid release of the brake; compared with the loop with no damping hole,the hydraulic impact is weakened,and the delay effect is more obvious with the decrease of the damping hole diameter.