The utility model relates to a centralizing device for an underground pipe column of an oil-water well, which is a device capable of centralizing an oil pipe or various underground tools in the underground pipe column in a sleeve. The device comprises a centralizing body, one end of the body is a lower connector, the other end of the body is connected with an upper connector, a limiting table is arranged on the body at one end of the lower connector, and the centralizing body is installed outside the body between the limiting table and the upper connector and can freely rotate on the body; theunderground tubular column righting device is connected into an underground tubular column. The centralizing device can be prevented from being impacted by a tripping pipe column, collision of the tripping pipe column to the centralizing device in the tripping process is remarkably reduced, the tripping pipe column cannot be damaged in the tripping process, and the centralizing device can play anormal centralizing role in construction or in the construction process. The service life of the underground tubular column and various underground tools in the tubular column is effectively prolonged, meanwhile, the quality of subsequent construction is guaranteed, the well repair period is prolonged, and the production cost is effectively reduced.