The invention discloses a hub unit finished product turning lathe. The lathe comprises a base, a cutting edge, a cutter holder and a first feeding device, wherein positioning profiling is arranged onthe base, a lifting base is arranged on one side of the base through a first lifting structure, a top base is arranged on the lifting base, a height measuring instrument is arranged on the top base, atop column is rotationally arranged on the top base, the top column is driven by a first motor, a second feeding device for driving the top base to move is arranged on the lifting base, the cutting edge is fixed on the cutter holder, a sliding base is arranged on the base, the sliding base is driven by the first feeding device, the sliding base is connected with the cutter holder through a secondlifting structure, and the first feeding device, the height measuring instrument, the first motor, the first lifting structure and the second lifting structure are all connected with a control device. The lathe can adjust the height of the cutting edge according to the height of the end faces of hub units, so that the flange end faces of the hub units with different tolerance ranges can be turned, and the lathe can be applied to the different types of hub units.