Folding type conjoint packing box

The utility model discloses a foldable conjuncted packing box, which belongs to the external packing box for cigarette or other articles. The width of an external cover plate (3) is bigger or equals to the sum of the height of a left box body (1) and a right box body (2); a foldable line (4) is arranged corresponding to the side length of the two box bodies (1 and 2) along the length direction thereof; the two box bodies (1 and 2) are respectively fixed on the external cover plate (3) at the both sides of the foldable line (4); an opening (5) is arranged on the mutually adjacent end surface of the two box bodies (1 and 2), or the opening (5) is arranged on the non-fixed surface of the two box bodies (1 and 2). The method of opening the cover is special; the seam of opening the cover is rather concealing without being easily perceived; the novel property is strong; the appearance design of the packing box is not affected; the area for taking articles is large; the effect of exhibiting the articles is fine; the