Soybean soaking and screening device for bean curd processing and use method

The invention discloses a soybean soaking and screening device for bean curd processing and a use method, the device comprises a soaking box and a screening box, the soaking box is provided with a feed port and a discharge port, the discharge port is provided with a switch piece, the screening box is internally provided with a screen with a vibrating piece, and the soaking box is internally provided with a water-permeable pressing plate capable of moving up and down; the pressing plate is used for moving downwards to press the surface of the soybean material pile when the soybeans are soaked; the device further comprises a sensor and a controller, and the controller is used for judging that soaking of the soybeans is completed when the sensor monitors that the pressing plate moves upwards to the designated height. By utilizing the volume change of the soybeans, the soaking process is automatically finished and the screening process is started when the soybeans are just soaked, so that the manual observation a