By incorporating of the vacuum principle, this Feeder firstly intakes the materials into the material tank, and then charge them into the material hopper, meanwhile the air trapped can be sucked out, so the shelf life of your products can be greatly extended. It features convenient feeding, minimizing the loss and waste resulted from manual feeding, and high mobility. By the operation of only one such Feeder, the feeding to multiple Stuffers can be satisfied, thus leading to a high productivity.