Drop-out type fuse

The utility model discloses a drop-out type fuse which comprises a base, an upper cover plate, an insulator, a fuse body and a limiting groove, wherein the bottom of the fuse body is hinged to the base, a round-surface upper movable contact is arranged at the top end of the fuse body, an upper fixed contact is arranged right above the upper movable contact, one end of the upper fixed contact is fixedly connected onto the upper cover plate, and the other end of the upper fixed contact is provided with a round limiting groove. A spring is arranged between the limiting groove and the upper cover plate, one end of the limiting groove is fixed on the upper cover plate, and two pins of the limiting groove are arranged on two sides of the fuse body. The drop-out type fuse can switch on fast and accurately, the upper movable contact of the fuse is totally and stably contacted with the limiting groove, safety is increased, and simultaneously working load of maintenance staff is reduced.