The invention discloses a feed processing device. The feed processing device comprises a square box and a movable bottom plate, wherein a smashing space is arranged at the lower right corner in the square box; a power space is arranged at the upper right corner in the square box; a vertical feeding hole is formed in the left side in the square box and communicated with the smashing space through ahorizontal feeding hole in the lower end; a work motor is fixed on the rear end wall of the power space; a large number of smashing blades are arranged on a body of a rotating shaft; a rolling deviceis fixedly connected with the upper end wall of the horizontal feeding hole. When the feed processing device works, the work motor drives a rotating rod to move circumferentially through a drive rod,other motion except left-right reciprocating motion of a matched moving block is limited under cooperation of a moving limit hole and a push rod, other motion except rotating motion of a rolling wheel is limited under cooperation of a limit plate and a limit space, and by means of rotation of the smashing blades on the body of the rotating shaft, granular feed is obtained.