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This invention belongs to the technical field of material roll stop mechanism in electromechanical science, and relates to a material roll synchronous self-locking stop mechanism. An electric slide is provided on the upper surface of the worktable, and a traction device for pulling the material strip is slidably connected to the electric slide. A mounting base is installed at the end of the upper surface of the worktable away from the traction device. A first mounting plate is fixedly connected to one side of the top of the mounting base, and a rotating roller is rotatably connected to the top of the first mounting plate. The stop mechanism utilizes its related structure to stop the material roll the instant the material strip becomes loose, thereby ensuring that the material roll does not continue to rotate due to inertia after the traction device stops pulling the material strip. This maintains a taut state that meets cutting standards after the traction device stops pulling. The lifting roller, based on different changes in the state of the material strip, quickly triggers the stop band to stop the rotating roller and releases the stop. Its overall structure is scientifically designed, its principle is simple, its operation is flexible, and it is environmentally friendly.