A high-strength hazardous article packaging plastic barrel comprises a barrel body and a barrel cover or only comprises the barrel body, the barrel body is a conical barrel body or a straight barrel body, reinforcing ribs are arranged on the barrel wall, the outer wall of a barrel opening is in threaded connection with the barrel cover, and when only the barrel body is arranged, the outer wall of the barrel opening is free of threads; the barrel body and the barrel cover are formed by injection molding of plastics formed by uniformly mixing, by weight, 70 parts of polypropylene resin, 302 parts of polypropylene, 2.5 parts of polyethylene resin, 5 parts of PHDE and 3 parts of a pigment; two ring ribs are arranged below the external threads of the barrel body, two barrel lifting seats are arranged between the ring ribs, buckling holes are formed in the barrel lifting seats and used for pressing connection of the barrel lifting seats, a ring groove matched with the barrel opening edge is formed in the inner side of the barrel cover, internal threads matched with the barrel body are arranged on the outer side of the ring groove, and a barrel cover outer ring rib and a barrel cover inner ring rib are arranged on the inner side of the ring groove; and barrel cover radial ribs are arranged between the barrel cover outer ring rib and the barrel cover inner ring rib and are connected with the cover top plate into a whole. The packaging barrel meeting the packaging, transporting and storing requirements of dangerous goods can be produced, and the packaging barrel is novel in structure, high in strength and toughness, resistant to falling, impact and corrosion.