Indentation device for packaging box

The utility model relates to an indentation device for a packaging box, in particular to the technical field of packaging box production equipment. The creasing device comprises a rack, a rotating shaft, a motor, a connecting rod, an extrusion rod, an extrusion plate, a creasing rod, a humidifying mechanism, a creasing table, a positioning mechanism and supporting legs, the rotating shaft is provided with an extrusion part used for extruding the extrusion plate, and the portions, on the two sides of the extrusion rod, of the bottom of the extrusion plate are connected with vertically-downward guide rods; the lower end of the guide rod penetrates through the connecting rod, the portion, between the bottom of the extrusion plate and the connecting rod, of the guide rod is sleeved with a spring, the humidifying mechanism is arranged on the connecting rod, the creasing table is arranged on the portion, under the creasing rod, of the inner wall of the bottom of the rack, and a creasing groove is formed in the crea