Automatic screening mixer

The utility model relates to the technical field of mixers, in particular to an automatic screening mixer which comprises a base, a stirring barrel is fixedly connected to the middle of the top face of the base, L-shaped rods are connected to the left side and the front side of the top face of the base, and round seats are fixedly connected to the side faces of two transverse rods of each L-shaped rod. A motor is fixedly connected to the top face of the round seat, the bottom end of a rotating shaft of the motor extends to the bottom face of the round seat, a first gear is fixedly connected to the bottom face of the round seat, long strips are fixedly connected to the side faces of vertical rods of the two L-shaped rods, and square plates are fixedly connected to the side faces of the two long strips. According to the mixing machine, through the cooperation of the motor, the inclined plate, the round rod and other structures, the second gear is meshed with the first gear to drive the round rod to rotate with