Adjustable grain grinding machine

The utility model discloses an adjustable grain mill which comprises a base, two supporting blocks are fixedly arranged on one side of the top end of the base, the top ends of the two supporting blocks are fixedly connected with the two sides of the bottom end of a milling cylinder respectively, a screening mechanism is arranged at the bottom of one side of the milling cylinder, and a transmission shaft is rotationally connected to the middle of the bottom end of the milling cylinder. A first grinding wheel is fixedly arranged at the top end of the transmission shaft, and a driven chain wheel is fixedly arranged at the bottom end of the transmission shaft. A grinding cylinder is connected with a screening mechanism, a folding corrugated pipe connected with a discharging box is connected with a screening box, a screen is arranged in a butt joint groove formed in a connecting frame in a penetrating mode, a vibration motor is installed on the screening box, an I-shaped piece connected with a connecting frame is