Raw material screening device for quartz stone processing

The utility model relates to the technical field of quartz stone raw material screening, and discloses a raw material screening device for quartz stone processing, which comprises a quartz stone raw material screening device, the quartz stone raw material screening device comprises a screening box, and the inner cavity of the screening box is provided with a screening mechanism. According to the raw material screening device for quartz stone processing, after screening is completed, an air cylinder is started, the air cylinder drives a first connecting block to move, the first connecting block moves to drive a second connecting block to move, the second connecting block moves to drive a supporting shaft to move, the supporting shaft moves to drive a fourth connecting block to move, and the fourth connecting block moves to drive a third connecting block to move; and a third connecting block moves to drive the front side of a screening plate to move, the front side of the screening plate moves to enter an incli