The utility model discloses a combined packaging box, which is provided with boundary beams, upper opening beams and lower opening beams as frames of the combined box, a first corner module and a second corner module are used for connecting a corresponding upper box
body frame and a corresponding lower box
body frame, all the boundary beams belong to third
glass fiber reinforced plastic edge strips, all the upper opening beams belong to first
glass fiber reinforced plastic edge strips, and all the edge beams belong to second
glass fiber reinforced plastic edge strips. The lower opening beam belongs to the second type of glass
fiber reinforced plastic edgings, when a packaging box with the size specified by a
user needs to be produced, a mold does not need to be remanufactured, the rectangular size of the combined box can be adjusted only by
cutting the corresponding glass
fiber reinforced plastic edgings and the box plates according to requirements,
machining edging sealing embedding openings and bonding and combining the edgings and the box plates through adhesives,
machining time is short, cost is low, and further, production efficiency is high. The first corner module and the second corner module each comprise a middle corner block, all the middle corner blocks belong to third glass
fiber reinforced plastic edgings, and therefore the depths of the upper box body and the lower box body can be adjusted after the middle corner blocks with different heights are
cut.