Abstract: In order to study the characteristics of the emergency braking of shaft hoisting system under different parameters, we use ANSYS, SolidWorks and RecurDyn software to establish MFBD（multi-flexible body dynamics）model of mine hoist, and use the method of control variable to analyze the effect of braking torque and distance of cage. The results show that when emergency braking is applied to the hoist, wire rope tension and cage vibration have big fluctuation, the average and maximum amplitude of wire rope tension and the average and maximum amplitude of cage deceleration increase with the increasing of braking torque; the higher the hanging height of the cage, the smaller the stiffness and damping of the system, and the braking safety is lower.