Automatic vertical packaging machine

The utility model discloses an automatic vertical packaging machine, and belongs to the technical field of food packaging equipment. The three-way valve comprises a first connector, a second connector, a third connector and a valve element, and the lower end of the hopper is communicated with the first connector; the discharging channel is communicated with the third connector, and the discharging channel is provided with a discharging nozzle; the feeding pump communicates with the second connector, and the feeding pump is used for sucking materials from the hopper and discharging the materials into the discharging channel; the back suction pump is communicated with the discharging channel, and the feeding pump is in transmission connection with the back suction pump. Due to the fact that the feeding pump and the suction-back pump are in transmission connection, the feeding pump and the suction-back pump move synchronously, when the feeding pump sucks the materials from the hopper, the suction-back pump sucks