The utility model discloses a pneumatic bipolar board feeding and discharging system that turns over for pyrolysis oven, including feed mechanism, discharge mechanism, feed mechanism's discharge gate and the feed inlet of pyrolysis oven intercommunication, the discharge gate of pyrolysis oven and discharge mechanism's feed inlet intercommunication, feed mechanism and discharge mechanism all include two at least material boxes that the stack set up, and every material box includes box body, drop in leaf, digging arm, cylinder, the drop in leaf is located the upper portion of box body, digging arm, cylinder all are located outside one side of box body, the one end and the inside movable turning plate connected of digging arm, the other end of digging arm with the cylinder is connected, through the reciprocating motion drive digging arm of cylinder, digging arm drive drop in leaf overturns from top to bottom to switch and opens and the closed condition. The utility model discloses a two the material box work completion feeding or ejection of compact are in turn stopped in the unnecessary air admission stove among feed mechanism and the discharge mechanism.