Dustproof vibrating screen with automatic flushing function

The dustproof vibrating screen with the automatic flushing function comprises a screen box, supporting legs are arranged at the four corners of the bottom end of the screen box, springs are connected between the supporting legs and the bottom end of the screen box, a vibrating motor is fixedly installed at the bottom end of the screen box, an adding funnel is fixedly installed on one side of the top end of the screen box, and the adding funnel is fixedly installed on the other side of the top end of the screen box. A first-level screen and a second-level screen which are obliquely arranged are fixedly installed in the screen box, a first vertical plate and a second vertical plate are fixedly connected to the top end of the screen box, a reciprocating lead screw is installed between the first vertical plate and the second vertical plate in a threaded mode, and a moving block is installed on the outer side of the reciprocating lead screw in a threaded mode. The screening device is ingenious in structure and con