Vacuum feeder is a vacuum feeding machine by using pneumatic vacuum pump as vacuum source. With this vacuum feeder materials could be fed directly from container into mixer, reactor, hopper, sheet press, packing machine, vibrating griddle, pellet trimming machine, hydro-state pelleter, dry-state pelleter and disintegrator. To use this feeder could lighten worker＇s labor intensity, put an end to powder pollution and ensure that the production process meets GMP requirements.