The wire rope and buffer cylinder anti-collision device is mainly used in large-scale ship lifts.At present,there is little research on the design method of this type of anti-collision device,and there are certain limitations,which directly affect the layout and design of the anti-collision device.Based on the analysis of energy conversion and spatial geometric relationship during the collision process between ships and collision avoidance devices,this paper proposes a design and calculation method for wire rope and buffer cylinder anti-collision device,including the design and calculation of important parameters such as wire rope tension,ship horizontal travel distance and oil cylinder buffer stroke,as well as the determination of control conditions.The safety and rationality of this design method are verified by comparing the design calculation results with the actual ship test results of the wire rope and buffer cylinder anti-collision device of Xiangjiaba ship lift.The proposed design method can provide reference for the design and modification of the collision prevention device for the wire rope and buffer cylinder anti-collision device of ship lift.