The utility model discloses a printer with structure of takeofing is prevented to clamp plate formula, including playing printer head and typewriter ribbon, it is equipped with the buckle to beat printer head, the typewriter ribbon is equipped with the draw -in groove that matches with the buckle, buckle and draw -in groove joint, still include clamp plate and base, it installs on the base to beat printer head, the clamp plate is including pressing part that is located the middle part and the connecting portion that are located both ends, the both ends of pressing part are connected with the one end of connecting portion, the other end of connecting portion is articulated with the base, when the printer is in operating condition, the pressing part compresses tightly the typewriter ribbon. The utility model discloses can prevent that the typewriter ribbon is not hard up and takeoff, guarantee the printing effect, make to print and understand, avoid the typewriter ribbon moreover and played the great collision of printer head production to prevent the typewriter ribbon and beat printer head to take place to damage.