The utility model discloses an expansion type female cone. The female cone mainly solves the problem that an existing female cone for fishing is low in success rate when used for fishing hard fallen objects in a buckle making mode. Wherein the diameter of the middle section of the body (1) is smaller than the diameters of the two ends of the body (1), a horn mouth (4) is formed in the right end ofthe body (1), a plurality of axial strip-shaped holes (3) are formed in the side wall of the middle section, and sawtooth-shaped threads (3) are arranged on the inner wall of the middle section. According to the expansion type female cone, hard fallen objects can be held tightly and then fished, and the success rate of fishing the hard fallen objects is increased.