An automatic turnover device for opening and closing a turnover piece is disclosed. The automatic turnover device comprises a base (11) mounted on the device body having a turnover piece; at least one drive mechanism (2) mounted on the base (11) and connected to the turnover piece, and enabling the turnover piece to automatically move between a closed position and an open position; and at least one elastic element configured and mounted to store the predetermined energy when the turnover piece is in the closed position, and to at least partially release the stored predetermined energy during the process the at least one drive mechanism is driving the turnover piece from the closed position to the open position, thereby at least partially balancing the weight of the turnover piece during the driving process