Alternate conveying device and production line

The utility model provides an alternate conveying device and a production line, and relates to the technical field of automatic equipment. The alternate conveying device comprises a frame, a transmission mechanism, a first translation mechanism and a second translation mechanism; a guide structure is arranged on the frame; the guide structure is provided with a concave position; the transmission mechanism comprises a synchronous belt; the synchronous belt is provided with a first mounting position and a second mounting position which are opposite in moving direction and are distributed up and down; the first translation mechanism is movably arranged on the frame and is connected with the first mounting position; the second translation mechanism is movably arranged on the frame and is connected with the second mounting position; the second translation mechanism comprises a lifting plate acting with the guide structure, and the lifting plate is adjusted by the guide structure to ascend and descend within the mo