The utility model discloses a paper cutter prop paper mechanism, prop paper mechanism main part including setting up in the frame, the both ends of propping paper mechanism main part set up cutter mechanism and paper feeding bracket respectively, it sets up in the many first stay mechanisms of propping the paper pole and setting up the frame below of frame top including parallel and interval to prop paper mechanism, each first paper pole that props has glossy surface, stay mechanism includes that a pair of stay pole and rotation set up between two stay poles and position quantity props the paper pole with the first corresponding second of paper pole that props, the surface that each second propped the paper pole has the damping layer, the junction that the second propped paper pole and stay pole still is equipped with an elastic component, the one end of two stay poles is rotated and is connected in the frame, the other end of two stay poles still all is connected with the piston rod of cylinder respectively, the cylinder is fixed in the bottom of frame, the utility model discloses can carry out effective stay to the paper by before the cutting, make the paper resume straight as far as possible, and can not lead to breaking of paper at the stay in -process.