Feeding and discharging production line of packaging machine

The utility model relates to the field of packaging machines, in particular to a packaging machine feeding and discharging production line which comprises suction cups, springs, sliding pipes, a lifting plate, a collecting box and a conveying mechanism, the lifting plate is arranged on the conveying mechanism, the conveying mechanism is installed on the collecting box, the lifting plate is connected with the two sliding pipes in a sliding mode, and the suction cups are installed on the two sliding pipes. Springs are installed between the two suction cups and the lifting plate, the lifting plate can move up and down on the conveying mechanism, the lifting plate can move left and right on the conveying mechanism, the lifting plate can move to the position over the collecting box, air pipes are installed on the two sliding pipes, the device further comprises a telescopic plate and an air cylinder I, and the air cylinder I is installed on the telescopic plate; and the lifting plate is mounted at the moving end of