Battery pole mounting structure and secondary battery

The utility model provides a battery pole mounting structure and a secondary battery, and the battery pole mounting structure comprises: a shell, the end face of which is provided with a mounting hole; the pole comprises a pole body which is arranged in the mounting hole, and the upper end of the pole body is exposed; the first fixing ring extends outwards from the pole body until the plane projection of the first fixing ring is overlapped with the part of the end surface of the peripheral side of the mounting hole, so that a first overlapping part is formed, and the first overlapping part is arranged above the end surface; the inner peripheral part of the second fixing ring is provided with a second overlapping part which is arranged above the first overlapping part, the plane projection of the second overlapping part is partially overlapped with the first overlapping part, and the outer peripheral part of the second fixing ring is fixedly connected with the end face of the shell; and the insulating part is