Grain crushing device with automatic feeding mechanism

The utility model discloses a grain crushing device with an automatic feeding mechanism, which comprises a crushing box, the top of the crushing box is fixedly communicated with a screening box, the top of the screening box is fixedly communicated with a feeding mechanism, the top of the feeding mechanism is fixedly communicated with a material storage box, and one side of the crushing box is fixedly provided with a crushing motor. The feeding mechanism comprises an adjusting frame, a sunken groove, a feeding through hole, adjusting lead screws, a sliding plate and an adjusting motor, the sunken groove is formed in the top of the adjusting frame, the feeding through hole is formed in one end of an inner cavity of the sunken groove, the adjusting lead screws are rotationally connected to the two sides of the sunken groove, and the surfaces of the two adjusting lead screws are fixedly connected with the two ends of the bottom of the sliding plate through sleeves correspondingly; an adjusting motor is fixedly in