Soft plastic packing box

The utility model discloses a soft plastic packing box, which comprises a box body, an upper box cover and a lower box cover. An inner cavity with an upper opening and a lower opening is formed in the box body, and a first slice-shaped structure and a second slice-shaped structure which can be folded back into the inner cavity are respectively arranged on the box body at the positions of the upper opening and the lower opening. The upper box cover is fixed at the position of the upper opening, the upper box cover is correspondingly provided with a first protrusion which can be clamped with the first slice-shaped structure, the lower box cover is fixed at the position of the lower opening, and the lower box cover is correspondingly provided with a second protrusion which can be clamped with the second slice-shaped structure. The soft plastic packing box is respectively provided with the first slice-shaped structure and the second slice-shaped structure which can be folded back into the inner cavity and the first protrusion and the second protrusion which can be respectively connected with the first slice-shaped structure and the second slice-shaped structure. Therefore, when the box cover is fixed at the position of the opening, the box cover is not easy to slide off.