Convenient and safe ampoule bottle cutter

The utility model relates to a cutter, in particular to a convenient and safe ampoule bottle cutter. The cutter consists of an upper groove and a lower groove, wherein the outside width of the upper groove is slightly smaller than the inside width of the lower groove, and the appropriate width is that the upper groove can sink into the lower groove easily; one end of the upper groove is a V-shaped opening which is provided with a medical carborundum disc; one end of the lower groove is a U-shaped opening; the notches of the two grooves are opposite to each other and the other end of the upper groove and the other end of the lower groove are connected together through a spring to form elastic force, so that the V-shaped opening and the U-shaped opening are kept open; and the cutter is applicable for the ampoule bottle in various specifications. When medicaments are taken and used in injection and infusion, the bottle neck of the ampoule bottle can be broken by only putting the bottle neck of the ampoule bottle