Two-way necking die

The utility model discloses a two-way necking die. The two-way necking die comprises an upper die base, a lower die base, an upper die and a lower die, wherein the upper die base is arranged above the lower die base and can vertically move relative to the lower die base; the upper die is fixedly connected to the lower surface of the upper die base; the lower die is fixedly connected to the upper surface of the lower die base; and the upper die and the lower die are provided with necking die cavities respectively. The upper die and the lower die are provided with the necking die cavities respectively, and necking is realized while two ends of a steel tube are punched once, so that the work efficiency is improved; and the two-way necking die has a simple structure and low cost.