The invention belongs to the field of stationery recovering machines, and particularly relates to a pen-holder rubber dividing device. The pen-holder rubber dividing device comprises a cover plate, aside wall, a baffle, a fixing plate, a base plate, a positioning die, a cutting module, a controller and a support; the cover plate is installed on the base plate through the side wall, and the positioning module is arranged between the cover plate and the base plate; the baffle is located between the cover plate and the base plate, and an installing box is arranged on the right surface of the baffle; the base plate and the cover plate are coaxially provided with through holes; the controller is used for controlling the positioning module and the cutting module to work; the support is arrangedbelow the base plate, a polished rod has the limiting effect on the cutting box, and a connecting rod on the upper layer and the cover plate are connected through a spring; and a connecting rod on the lower layer is connected with the base plate through a spring, and the spring has the effect of resetting the cutting box. The pen-holder rubber dividing device is mainly used for automatic cuttingtreatment on a gel pen with a transparent pen holder sleeved with rubber, the position of the rubber is automatically detected through a detecting element, and the cutting accuracy is improved; and meanwhile, the manpower cost is reduced.