Abstract: In order to solve the problems of low efficiency and high labor intensity in the traditional grinding wheel cutting method used for steel cord conveyor belts at Datong Coal Mine Group Tongdi Yisheng Coal Co., Ltd., a high-efficiency cutting device for belt replacement of coal mine belt conveyors was designed, and the structural composition and working principle of the belt cutting device were analyzed. The conveyor belt type ST1000 was selected, with an internal steel wire rope diameter of 8 mm, and the motion speed was set to 5 mm/s. The finite element analysis method was adopted to carry out co-simulation of the motion process of the belt cutting device in HyperMesh and LS-DYNA, and the kinematic characteristics of the actuator were obtained. During the cutting process, the maximum angular velocity of the toothed cutter disc reached 103.25 rad/s, while the angular velocity of the fixed-length cutter reached a minimum value of −75.46 rad/s. The angular velocity variation throughout the entire simulation process exhibited periodic regularity without sudden changes. Field tests on a DTL100/18/2×160 belt conveyor used at Datong Coal Mine Group Tongdi Yisheng Coal Co., Ltd. showed that cutting a conveyor belt with a width of 1000 mm took only 19 minutes, with an average cutting speed of 52.63 mm/min, which can achieve rapid cutting of the rubber belt and meet on-site cutting process requirements.