Feed crushing device with dehydration function

The invention discloses a feed crushing device with a dehydration function, wherein the feed crushing device includes a box body, a crushing mechanism, a pre-extrusion mechanism and a dehydration mechanism; the box body is internally provided with a sieve barrel, the central position of the upper end face of the bottom of the sieve barrel is fixedly connected with a first rotating shaft, the outerside of the first rotating shaft is provided with a rotating barrel in a sleeving manner, and the outer wall of the rotating barrel is fixedly connected with crushing blades having the blade distancegradually decreased from top to bottom; the pre-extrusion mechanism is arranged below the sieve barrel; an aggregate hood is arranged below an extrusion roller group; the dehydration mechanism is arranged below an extrusion material hood. Through cross arrangement of a hourglass shaped dehydration barrel as well as spiral extrusion blades and an extrusion cone, feed dehydration is more thorough,the dehydration effect is i