Screening device with adjustable screen mesh aperture for mineral separation

The utility model relates to the field of screening devices, and discloses a mineral separation screening device with adjustable screen mesh aperture, which comprises a kaolin screening box, a kaolin adding hopper is fixedly arranged at the top of the kaolin screening box, a vibration motor is fixedly arranged on the side surface of the kaolin screening box, and a main screening plate is arranged in the kaolin screening box. A discharging hole is formed in the side face of the kaolin screening box. The adjusting assembly is arranged on the main sieve plate and comprises a supporting piece, a moving plate and an auxiliary sieve plate, two rectangular grooves are formed in the bottom of the main sieve plate, the supporting piece is fixedly installed in the rectangular grooves, the outer side of the supporting piece is sleeved with the moving plate in a sliding mode, and the bottom of the moving plate is fixedly connected with the auxiliary sieve plate; the adjusting assembly further comprises a vertical support