Feed additive raw material crushing device

The utility model relates to the technical field of feed additive production, and discloses a feed additive raw material crushing device which comprises a machine body, a feeding port is formed in the top of the machine body, two mounting rods are arranged in the machine body, crushing rollers are fixedly connected to the two mounting rods in a sleeved mode, and a sieve plate is arranged in the middle of the interior of the machine body. A collecting box is movably installed on the lower portion in the machine body, an adjusting mechanism is arranged on the machine body and comprises an adjusting groove, a base, a driving motor, a transmission shaft and a transmission screw, and the adjusting groove is formed in the position, corresponding to the installation rod, of the rear side wall face of the machine body. According to the raw material crushing device, through the arrangement of the adjusting mechanism, the transmission screw rod can move in the adjusting groove, and then the distance between the two cru