Guard plate structure capable of being turned up

The utility model discloses a turnable guard plate structure which comprises a mechanical frame, side plates, guard plates, round steel positioning blocks, a conveying belt, supporting blocks, limiting blocks, supporting legs, supporting feet and cross beam rods, the four supporting legs are symmetrically installed at the bottom of the mechanical frame through bolts, and the conveying belt is fixed in the upper end face of the mechanical frame. Side plates are arranged on the two sides of the mechanical frame, a row of long-strip-shaped positioning holes are evenly distributed in the central axes of the two sides of the upper end of the mechanical frame, the side plates are symmetrically fixed to the long-strip-shaped positioning holes in the two ends of the mechanical frame through bolts, and two clamping grooves are formed in the sides, facing the interior of the conveying belt, of the interiors of the side plates. And positioning groove holes are formed in the upper ends of the interiors of the side plates