The utility model discloses a make things convenient for packing carton of dismouting, the packing carton includes first panel, second panel, third panel, fourth panel, the 5th panel, does between panel and the panel to rotate and connects, still includes two limited units, it includes middle hardboard and establishes to inject the unit the soft board of hardboard both sides, the bottom of hardboard with the second panel is done to rotate and is connected, the soft board is square, the soft board along the one corner of the bottom adjacent with the hardboard and rather than the diagonal that another corresponding angular form becomes fall into stick part divide with stick part branch not, not the tip that divides of stick part with the tip of hardboard is done to rotate and is connected, stick part glues respectively first panel with on the third panel. The beneficial effects of the utility model are that: when the box need not use, can be with the packing carton fully expand, all panels were in the coplanar this moment, injectd that the unit is whole laminates with the second panel, conveniently deposit, transport.