Spiral feed type straw compressor

The utility model discloses a spiral feed type straw compressor, which belongs to the field of agricultural machinery and increases the density of straw briquettes through three times of compression. In the compressor, a transverse bunker is communicated with a vertical bunker; an auger is arranged in the transverse bunker; a movable auger which moves up and down is arranged in the vertical bunker; the vertical bunk is communicated with a discharge passage; a piston is arranged in the discharge passage and connected with a crank shaft through a hinge; the crank shaft is connected with a power input wheel; a reducer is arranged in the discharge passage; and a hopper is arranged on the transverse bunker. The compressor has a simple structure and is convenient to operate and use; the compression density of the material is increased by first compression of the transverse bunker, second compression of the vertical bunker, and third compression performed by the piston and the reducer in the discharge passage; meanw