Automatic power-off device for belt overflow

The utility model discloses a belt overflow automatic power-off device which comprises a spring, a lever, a proximity switch and a collection frame, the spring is located at the fulcrum position of the lever and located between the lever and the collection frame, the two ends of the spring abut against the lever and the collection frame in the vertical direction respectively, and the side, not incontact with the spring, of the collection frame is provided with the proximity switch; the lever is close to one end of the proximity switch and comprises a metal sheet relative to one side of the proximity switch. According to the device, a proximity switch detects displacement signals of a lever through a metal sheet on the lever, and when the displacement signals of the lever are within the detection distance range of the proximity switch, the proximity switch sends electric signals to a control system of a belt system, so that the belt system is controlled to be in a non-running state; equipment and safety and en