The invention discloses a foldable turnover mesh belt and a feeding and discharging system provided with the turnover mesh belt. The foldable turnover mesh belt comprises a conveying belt, a first rotating shaft and a turnover frame capable of rotating around the first rotating shaft; the foldable turnover mesh belt further includes a folding frame and a folding drive device; the folding frame is connected with the turnover frame and rotates relative to the turnover frame; the conveying belt is wound on the turnover frame and the folding frame; the turnover of the turnover frame drives the folding drive device which synchronously drives the folding frame to rotate relatively to the turnover frame. The foldable turnover mesh belt has the advantages that space is saved, low pollution is realized, and the factory building height limitation for the turnover mesh belt is avoided; the feeding and discharging system includes the foldable turnover mesh belt, and has the same advantages that space is saved, low pollution is realized, and the factory building height limitation for the turnover mesh belt is avoided.