The invention relates to the technical field of belt conveyors, in particular to a conveyor auxiliary turnover device which comprises a roller, shaft rods are fixedly connected to the two ends of the roller, each shaft rod is sleeved with two first rolling bearings, and the two first rolling bearings on each shaft rod are both installed in a bearing seat; connecting seats are installed on the lower portions of the outer surfaces of the bearing seats, a double-screw bolt parallel to the roller is arranged on one side of the roller, supporting lugs are installed on the outer surfaces of the two bearing seats, the two ends of the double-screw bolt penetrate through the two penetrating holes correspondingly, and the two ends of the double-screw bolt are in threaded connection with first nuts correspondingly. A plurality of rings making contact with the roller are arranged on the stud in a sleeving mode, second rolling bearings are installed in the rings, second nuts are arranged on one sides of the second rolling bearings, and third nuts are arranged on the sides, away from the second nuts, of the second rolling bearings; the invention has the following beneficial effect: the load of the roller acting on the connecting part of the shaft rod and the bearing seat is dispersed.