The utility model discloses a rotary type dual-work position molding mechanism which belongs to a dual-work position device of a tableware molding machine and solves the prior technical problems of strong labor intensity and low production efficiency. The device comprises a machine frame (1), a pin oil cylinder (2), a die plate A (3), a large panel (4),a bull gear (5) and a rotary disc (6), wherein, a plane bearing (13) is arranged at the central hole of the large panel (4), the rotary disc (6) is arranged on a radial sliding bear (7), the bull gear (5) is fixedly arranged under the rotary disc (6), a motor seat (15) is arranged on the large panel (4), a hydraulic motor (8) is arranged on the motor seat (15), a pinion gear (14) is arranged on the motor (8), the pinion gear (14) and the bull gear (5) are meshed to realize that the rotary disc rotates by 180 degrees clockwise and counterclockwise through an upright column (9) being adopted as the centre, the pin oil cylinder (2) is arranged under the large panel (4), and pin holes are arranged on the bull gear (5). The device improves the qualified rate of products, enhances the production efficiency and prolongs the service life of the entire equipment.