Square plastic packing cylinder

The utility model discloses a square plastic drum; a barrel is connected with the end of the drum; the upper part of the drum is in accordance with the cover of drum; a convex rib is arranged at the upper part of drum; a clasp and a seal ring is made at the edge of the drum cover; the clasp matches with the convex rib; the seal ring is inserted in the barrel; a concave is designed on the drum cover; the convex rib of the barrel wall of the drum is fixedly connected with the clasp on the wall of the drum cover and cannot slide and loss with strong bonding; the seal ring of drum cover is inserted into the barrel; the barrel top is clamped by the inside and the outside of barrel with good sealing. The concave of the drum cover increase the intensity of support for the upper drum cover.