Material pre-grinding device for cement grinding mill system

The utility model discloses a material pre-grinding device for a cement grinding system, which belongs to the technical field of cement processing, aims at solving the problems of unsmooth cement feeding, even blockage and serious cement dust raising, and comprises a processing box, the processing box further comprises a rack, the rack is fixed on the outer side wall of the processing box, and the rack is fixed on the outer side wall of the processing box. A feeding hopper is fixed to the side wall of one side of the treatment box, a feeding assembly matched with the feeding hopper is arranged on one side of the treatment box, two crushing rollers which are symmetrically distributed are rotationally connected to the side wall of the inner side of the treatment box, and straight gears are arranged at the same ends of the two crushing rollers; the movable plate is driven by the feeding assembly to swing back and forth, so that cement in the feeding hopper can enter the treatment box intermittently, the situatio