Abstract:As the moving mechanism of BHS fast replacement device for first ropes was controlled by the quantified overloaded hydraulic system, to avoid the ropes wrapping since hydraulic shock, electrohydraulic speed control system was adopted to regulate the velocity of conveying ropes. The moving characteristics of the stepping cylinder were studied by using simulation platform AMESim. The curves of the cylinders displacement, velocity, acceleration and pressure were gotten, and the stability of the hydraulic system was determined.The results provide theoretical foundation for the design of BHS fast replacement device for first rope.