A paper inlet safety protection device with an upper cover plate, a safety cover plate, a paper entrance block and an elastic component. The upper cover plate is connected with the upper cover plate, first end of the upper cover plate covers inlet of the paper entrance of the upper cove plate, paper entrance block is arranged toward the paper entrance and in the upper cover plate, and limits the second end of the safety cover plate, two ends of the elastic component connect with the inner wall of the upper cover plate and the paper entrance block respectively, the paper entrance block is connected fixedly with the second end, or integrated with the second end, or limits the studs arranged on the second end, the paper entrance block is positioned between the paper entrance and the elastic component, the safety cover plate is pivoted with the upper cover plate.