Companion product packing box

The invention discloses a companion product packing box which comprises a companion packing box (B) and a target product packing box coupling box skirt (A) as well as a middle interlayer (2) between the companion packing box (B) and the target product packing box coupling box skirt (A); the target product packing box coupling box skirt (A) is provided with a skirt side (5); the skirt side (5) can be provided with a pre-pressed crease line (4) in each direction; and the side surface, towards the target product packing box, of the middle interlayer (2) is equipped with a double-sided adhesive sticker layer.