Packaging assembly line

The utility model discloses a packaging assembly line which comprises a packaging box transportation assembly, and the packaging box transportation assembly is provided with a first feeding end and a first discharging end. The box sealing transportation assembly is provided with a third feeding end and a third discharging end; the box sealing transportation assembly comprises a box sealing assembly; the product transportation assembly is provided with a second feeding end and a second discharging end, and the second discharging end is in butt joint with the third feeding end; and the packaging box overturning assembly is arranged between the packaging box transportation assembly and the box sealing transportation assembly, and the packaging box overturning assembly is used for overturning the packaging box, so that the state that an opening of the packaging box faces the box sealing transportation assembly is changed from the upward state to the state that the opening of the packaging box faces the box sealin